I generally leave them alone, too... but this is one place (to my mind) where a flag is appropriate. Some relative newcomer who hasn't yet learned better doesn't deserve to be taken in by this sort of thing and lose the few hundred $$$ they've managed to scrape together.
Besides, I'm also selfish. I don't want Steemit to be known for this sort of shyte anymore than it already is... so if I can help preserve its reputation, it'll help MY rewards, too.