If SE goes scorched earth, they will lose a lot of customers. Of course there would be a bunch of people on the forums going "serves you all right, cheaters!" even though maybe someone just imported a hairstyle or wanted to improve their own play, but you know.

That said, I do worry a bit that some addon dev will eventually push things too far. Like the TEA stuff that Yoshi talked so much about in the most recent PLL. Even if they don't bend to installing anticheat software, there are things they could do to break addons, but it would break all of them, not just the "black" ones.