Check the r/wowhardcore/ subreddit for details. I’ll probably get in trouble for posting his name here.
Everyone is saying to add him to your friends list and keep track of where he is at all times so you can avoid him. Hopefully Blizz can fix this bug during tomorrow’s maintenance in case anyone else starts following this guy’s example.
Yeah I’ve been trying to go around and decurse his pet whenever it is out but I’ve only managed to spot him a few times before he shadowmelds and hops away.
that’s just the debuff where it spawns a ghost that can kill lowbies and bank alts right? 
not too terrible
i shed no tears for bank alt deaths btw.
Thanks for protecting us!
Thank you for this warning, and thank you to Xinrya for trying to mitigate the griefer’s efforts.
Nope, this one spawns level 60 mobs. It’s not just lowbies getting hit.
Hes back online now, in strat getting the curse, more griefing today it seems. Heaven forbid blizz would actually do something before his kills are in the hundreds. Absolute dog.
No, not just lowbys. Ppl are posting deathlogs and it’s a bunch of 30s and even a couple of 40s and one 50ish that we know of.
But you’re ok with griefers, as long as it doesn’t affect you or the way you play. Noted.
it’s a doggy dog world man
… try to have some compassion.