Oh fun, I just blocked someone who responded to a one-off comment that (very vaguely) described my (very specific) next book with "And what makes your book different from the hundreds of other people writing about the same thing???" People of Mastodon, don't do this. This is why people don't enjoy talking about their research here.
The other one I'm getting a lot is "You used a word I didn't know! Everything you write should be pitched precisely at me, a stranger who found your post!"