Is there policy on intentional beer throwing at people?
Edit: I thought it was funny because of how “epic badass” the OP was trying to come across, plus the absurd lengths the commenters went to defend obvious antisocial behavior. Remove your reddit brainworms! The joke is not someone wanting their girlfriend to not be harassed, the joke is Reddit
Honestly screw it, I don’t think the OP is really funny anymore, either. They might come across as silly due to being angry but who doesn’t? Plus they’re vegan, so, 
the post is funny because of the “epic chivalrous boyfriend” OP and the horde of ravenous Redditors defending shitty antisocial behavior.
Just don’t throw piss cups at people it isn’t that hard. Treating people like human beings is not difficult. No need to get in treat defender mode over people being obvious assholes