The people that are only goofing around get to wear the ass hat around the party and alley oop some setups at their own expense. The real assholes are confronted about their shit and end up either a little more enlightened from the experience or publically mocked about it. Not for nothing but I think it makes bullshitting with strangers more fun.

Edit: it helps to know the shittiest people especially don’t like being laughed at.