If the topic can be talked in the public and family without any problem then it will be treated as general content and if not then it can be treated as adult contant ---- This is how Google views a website.
I will opine, Food.
Not if it's cannibalism.
Asking and answering your own questions ?
I don't know. Dogs? Cats? Birds? Weather? Trains? Anything that doesn't have to be censored on this site?