Well the UK is near and there are cheap flights so yeah that combined with Amsterdam's reputation and the way certain people like to "represent" the UK abroad is a pretty bad mix. But there's just tons of people from all countries all over the world that are smoking weed under your window, pissing on the street, don't watch out for cyclists and so on. You don't fix Amsterdam by banning the Brits.

Also, Dutch stag parties seem not to be that far off what happens in the UK.