what was the most selfish thing you saw someone did and or say?

Bro, I swear I once saw this dude at a buffet fill up his entire plate with crab legs and just leave the rest of us hanging! Like, come on man, have some consideration for your fellow hungry humans. And when someone called him out on it, he just shrugged and said ‘Hey, I paid for this buffet, I’ll eat what I want.’ I couldn’t believe the audacity. Talk about being selfish and inconsiderate