It's just a bit of fun. I feel sorry for anyone who takes this kind of thing seriously which is what I think you're doing when you should just realize it's just for fun and you shouldn't question it unless it directly affects you. Not everything in life has a point to it. Some things like this are just done for shits and giggles for bored folk sat on facebook. I wouldn't let it bother you really. I'd suggest either lightening up or blocking the people or posts that irritate you as that's what the options are there for. I'm not too big of a fan of the WHICH MEMBER WOULD YOU _____ threads but I don't let them get to me as they're simply people having a bit of a laugh. Who am I to shit on them?