How is enforcement going to be a large issue? Doesn't every forest have a forester (Not sure if that is what it's called, but we have people who "takes care" of forests in Denmark). If a forester sees people cutting down trees with large machinery, he would just call the police?
I doubt anyone cares if Mr. Random goes into the wood with his axe, chops down a tree he can carry and runs off with it.
The subreddit mods had already told people in a announcement not to post anything of McKayla Maroney and that if any posts containing images of her existed, that they would delete the posts and ban the people posting that.
Indexing is simply the second step in the the process, scraping is the first step, and (users) searching the index is the third step.