I logged into Kbin today to see 18 notifications where the same guy banned me from all of their magazines for downvoting them.
I was only subscribed to 1 of those magazines, but it's still annoying to wake up to 18 ban messages from someone who got easily angered from a downvote.
(Side note: IMO, this is why being able to see downvotes is bad. Even if anyone could see them by spinning up their own instance, that's a lot of work compared to pressing 2 buttons.)
I've blocked the guy, but is there anything that can be done to stop this from proliferating across the site?
Well if someone made a magazine that's absolutely unique in history and cannot be duplicated then yeah that might be a concern. But, honestly why not make a rival mag or find a simliar one to migrate to? There's plenty of magazines in the sea. If this guy has 18 that are squarely in your wheelhouse and there are no other options, you could make 18 new ones or boogie on over to the next instance.
I'm not saying we shouldn't be fussy about admins being adults and acting fairly. Just that we're still early in the ballgame here and the whole thing of four-mods-owning-800-subreddit things or whatever really shoudln't happen here for any good reason.