The Tempest member who you infer is Liia <Tempest>, logged his own monk on (Soapx). And with Getsome <Aftermath>, Jumbalaya <Aftermath>, Orna <Aftermath>, Mohini <Rustle>, and Ogee/Dellie <Rustle> went to plane of hate.
After a half hour or so, Bellringer, leader of Tempest tells Liia to not group with Aftermath people. So he logs his monk off, and logs on Satisfiability. Satisfiability is a monk owned by Unicity <Core>. Unicity retired from the game a month or longer earlier and hasn't answered on discord, or text messages since. Uni and Liia have been good friends for years.
They port Satisfiability up to hate. He has no guild tag (Noone knows when he was de-guilded, if it was on that day or earlier; and continue their little fun session killing random mobs and seeing if a named pops.
https://www.twitch.tv/videos/302198032 From about 2:55:00 onwards.
No active or current member of <Core> was in plane of hate. No tagged member of core was in plane of hate. No-one from <Core> knew Satisfiability was being used in Hate.
Someone outside our guild using a retired character got us a suspension extension. And he feels terrible about it, as Liia is a super nice guy and great fun, generous, willing to help anyone etc. There was a post on the forums about him not 2 months ago thanking him for giving away a monk chardok staff on his enc Rosalye to a stranger.
So your question shouldn't be why Tempest logged on a core toon....The world isn't so nefarious. The question should be at what point did Core become liable for a suspension extension out of it?
Another suspension extension happenned when a random person from <Blood Guard> who is friends with Speedi <Core> logged on his cleric Kaledar <Core>, and gated him to Plane of Mischief to spend time rezzing people. Speedi has also quit the server for all intents and purposes and when we formed Core, tagged his toons so he could come chat on the very rare occasions he logs in for an hour to say hi (I've never seen him do it). Speedi's an old pal of some of us Core people from 5+yrs ago, so of course its super awesome to have him be able to pop his head in to familiar crowd if he felt the desire.
So Speedi gives access to his cleric to a buddy of his, presumably to be all nice and rez folks, or to make some plat rezzing folks. Who cares. Random <Blood Guard> guy doesnt know the ins and outs of raid suspension and probably doesnt even know Core is suspended. Likely he's entirely oblivious.
Core gets a suspension extension for his rezzing folks in PoM on a retired persons toon.
I'm at a loss for words.