I just get fed up with people who try to legislate one way or another.
This is the crux of the matter, though. The only way to legislate about something like this is to legislate against it, as you can't really pass a law saying that it is now compulsory to whistle crudely at female passers by.
So nothing happens, which is all well and good if you are flattered by male attention of this sort, but ignores the point of view of those who are not. Not everyone wants legislation, or to criminalise it. Personally, I think it would be much better if it went the way of smoking in public, and just became socially unacceptable. I think it is going that way anyway - as people have said, younger people of both genders tend to see it as sleazy and a bit neanderthal.
I really don't understand why people who find it unpleasant are accused of being humourless, uptight, unconfident, immature etc etc. I just don't see the logic. Whatever else it is, wold-whistling isn't funny, is it? So how is objecting to it linked to having no sense of humour? The same lack of logic applies to the other accusations. They just make no sense to me.