Cmd+F'd the comments and not one person has mentioned overpopulation. There are more people than ever before, and the issues of crowding are simply a symptom of overpopulation. The idea of raising the prices to make it cost-prohibitive... what's the point of doing anything, then? Soon, every single hobby will have too many people doing it. Are we to raise the price of everything to be so unaffordable that we go back to spending evenings sitting in front of the television?

We need to face the problem sooner or later, and that's that we have too many people on this planet. We're going to have a massively difficult time feeding everyone in 20+ years (the meat industry is already devastating enough on the climate), "tourist crowding" will be the least of our worries. Well, until the lack of food or the climate issue sorts that first bit out.