When I see them, I flag them. I usually don't go looking, but when I see it after I post something new, or if people try to promote it on steemit chat, I flag it.

Create original content, or at least offer a proper review. Don't just copy/paste stuff unless you decline payout. It's not that difficult a concept. Why are you trying to make a quick profit off someone else's work and dilute the reward pool for content creators?