hasn't been used that way as of yet and we believe for many reasons it will be avoided by smart farmers because it's too high profile and too easy to find them. They have too many other methods to hide their farming. But if you see cases bring them to the attention to people
What people will do first is post their full post to multiple communities... they'll do that way before using cross-posting.
I also haven't noticed much abuse yet. I guess people know better as you thought they would.