Web 2.0 – the combination of web-based applications, social networking and user-submitted content – is getting lots of people very excited, but as Xeni Jardin writes in Wired, Web 2.0 faces the same problem as Web 1.0: people.

Web 2.0 is very open, but all that openness has its downside: When you invite the whole world to your party, inevitably someone pees in the beer.

These days, peed-in beer is everywhere.