I know I am preaching to the converted, because the sort of people who read swimming news groups don't commit the sort of crimes I shall speak of. Most readers won't be victims either, so bear with me while I look for a bit of sympathy from the net's swimming elite, for an old splasher who has to swim in public sessions. For all you club swimmers who may not know, public sessions are the annoying times when the club is expelled from the pool in favour of the sort of people who arrive carrying a soggy looking carrier bag and with the furtive look of someone sneaking in to a mucky film. Being a bit over the hill and yet not wishing to admit it, I have to swim in such sessions, because I just can't get to the club enough. However, I bring the legacy of club behaviour with me inasmuch as I expect other people to behave properly; but they don't. If you should have the misfortune to have to swim with the public some pointers on who to avoid may help. The most obvious category to avoid is women with hairdos. They display herd behaviour, and 'swim' four abreast, catching up on the week's gossip. The most heinous crime you can commit is to dampen their hair or face. I did once by accident, and was kicked in the groin in punishment. In retaliation I accidentally splashed even harder on my next length, only to have a full set of long varnished nails slashed down my back. My wife believed my explanation of the scars, god bless her. Don't be fooled either if they wear a shower cap, it's even worse because it shows they mean to stay. They invariably swim a stately breast stroke, characterised by a slow leg kick which pushes the water down with the top of the feet while keeping the toes and heels firmly together - anything more would be unladylike. This is of course near useless for exercise, and they can't understand why their legs continue to look like jodhpurs. With or without the shower cap they will regularly congregate at the ends of the pool for a proper talk, always choosing the bit where you want to perform your tumble turns. Men can be just as bad in their way. Here there are two danger signs. The first is a pair of baggy shorts, the second is anyone on the poolside clutching his towel. The towel on the poolside is the sporting equivalent of a comfort blanket, and is a dead give-away. If you see someone in baggy shorts and clutching a towel approaching the water, get out; you won't stand and earthly. They will thrash violently in the water, oblivious of everyone else in the pool, and yet go almost nowhere. It hasn't dawned on them that wearing the equivalent of a parachute in the water makes about as much sense as going jogging with a rickshaw strapped to your backside. If they do make any progress it will probably be across the pool, when everyone else wants to do lengths. In a fit of public spiritedness I once offered advice to one such fellow to swim lengths. He then proceeded diagonally. I went on to explain the purpose of the stripes on the pool bottom, only to be told that in 10 years he had never noticed them before. I was not surprised to recognise him some days later among a group of UFO spotters on the hills above the town. More innocent, but equally dangerous is the short sighted swimmer. I have to declare the reason for my sympathy is that I am very short sighted myself . In the days before I found out that contact lenses are perfectly safe under a good pair of goggles, I was quite dangerous myself. My wife and I used to swim a lot when we were courting, and she took the precaution of having a very bright and distinctive costume so I could locate her in the great fuzzy mass of pink bits, which was all I could see. This worked well until one day another girl in an identical costume beat her in to the pool. I was only saved from a serious charge by my wife's hurried explanation and the natural tendency of women to believe each other over anything a man might say. God bless her, again. Swimmers with poor eyesight can be spotted by the red marks on the bridge of their nose, and their tendency to walk in to pillars. Please be patient if you find one blundering about in the wrong changing room, it's pointless being a voyeur without your glasses on anyway. The final menace is the pretentious swimmer. They can't be spotted in advance, but as soon as they strike out you'll see them. I call them pretentious, because their stroke looks more like a hand ballet than a means of propulsion. Also, they tend to swim with their eyes blissfully shut. On front crawl they will bring their arm forward on the recovery as if launching a javelin, but pause above the water with backward bent fingers, to then elegantly lay the hand on the water and watch it disappear like Ophelia . What happens under the water is less important to them than how they look to the lifeguard. On breast stroke they adopt an exaggerated glide, lifting the face fully clear of the water each stroke to display a smile of inner nirvana. It is the legs which do the harm though. Their breast stroke kick is three lanes wide, and always perfectly timed to coincide with your painful bits when overtaking them. The final feature I would point out is common to all those types I have mentioned. It is their rudeness. Whenever I try to point out the error of their ways to them you just wouldn't believe the things they say. I mean, it's every citizen's duty to offer advice to those who need it, isn't it? I have worked this to advantage now though. I have offered enough advice to enough people now that, though I still can't avoid them, they've started avoiding me.