Every public interaction you make is an excuse for Facebook to shove it in the face of your friends. If you see this and angry-like it, it pops up on a few hundred more feeds. Rinse, repeat. Viral.

Facebook is particularly bad because their moderation team appears to be staffed exclusively by a pile of libertarian twelve year olds. I've flagged local drug sales, sexually explicit content (no, not casual or functional nudity) many times and had my flags rejected.