They can't prevent the initial abuse, of course, but they could, at the very least, think about the people who are affected by these attacks before making changes, instead of rolling back only after there's an outcry.
Simple measures, such as banning a whole IP from contacting/following/mentioning the person who reported it, should help a lot. And if they want to allow comments from Tor and other proxies - and I think they should! -, they could allow users to block everyone using them from contacting/following/mentioning them.
In general, they could give a damn, instead of just reacting to criticism.