I don't mind much, like bob, someone can blow into the bong (which someone did at my last party but only because he heard me wrong lol), someone can spill an ashtray, bowl, drop a j, lip a j/bunt, spill bong water, WHAT EVERRR..I don't care.

I DO hate a few though,
- Moochers. Throw in like 3 bucks, man.
-Annoying (typically) freshman who come to my parties and are like OHEMEFFGEEIMSOOOOOSTONED.
-This stupid girl one of my best friend's is dating...she won't smoke on her own, he either has to hold and light the bowl (which i do sometimes for my extremely fucked up friends, but she'll be sober) or he will take a hit and blow it into her mouth.
-I hate people who bitch about my bud (doesn't happen often but a newbie will come in and be like 'i smoked shit that was like 10x better then this). Don't smoke it then, assfuck.
-Disrespectful smokers. For example, on 420 one year my neighbor (never hung out with him before) came over and walks in, right in front of my mom, takes off his shirt and says loudly "IT SMELLS LIKE WEED IN HERE"