This comes off at fake to me. Yeah they're removing 5 harassing subreddits like /r/FatPeopleHate but they're leaving arguably worse subreddits, like /r/CoonTown/, up? This feels like they just kinda picked a few subreddits people have seen to make examples of them and hope it makes advertisers more comfortable.
Yes, this comment is more inline with what's going on. It has little to do with protecting people from harassment, it's about trying to make reddit more appealing for advertisers and imgur more appealing for a buyer.