People are not doing it on purpose they are exercising.
Nearly always not on purpose...
Not swimming in the right speed lane otoh should be banned. As well as doing backstroke and butterfly in shared lanes
Agree with this. If you time it right at my pool, you can sometimes get a lane to yourself (sadly, the council does not seem to realise that this is how it should be whenever I fancy a swim.) Then it's fine to do backstroke or fly.
We have one bloke who goes up and down at the same pace, never stopping at the ends. This would be fine if he weren't slower than most people, or had awareness to let the people swimming at his toes overtake at the end. I've never quite given into the temptation to kick wide when passing him, but I've definitely thought about it.
There was a bloke the other day who was really slapping his hands down onto the water while doing crawl - if he just angled his hand slightly when he enters the water, his stroke would be far more efficient and probably faster and definitely less splashy.
Many moons ago, when I did lifeguard in training, we learnt to do front crawl with heads up - it means you can keep your casualty in sight as you approach, which you couldn't with normal crawl. It just takes a bit of practice.
I do think if people want to keep their heads dry, the swimming pool is the wrong place to go. (Yes, aquafit class, I am looking at half of you lot. If you're not splashing, you're not working hard enough.) It's a swimming pool. The whole point is to get wet.