Dude, a "beverage" can just mean a glass of water.

We're talking about parts of human psycology like not having the same posture as the rest of the group. Of course it's prejudice, but it's also real and difficult to be aware of when it's happening to you.

Also, nobody is showering their drink on you if you don't participate, so blowing your blunt smoke in their face is a much bigger asshole move for me.