Yes, that's right.
Thank you for confirmation.
I can't say for sure, but I think Trashcan is cleaned manually.
This seems most likely, since, as far as I see, those posts remained there for years now...
For one reason or another, moderators may delete the topic immediately or move it to trashcan. In this case, the moderators act at their discretion.
Perhaps, in this case, it was a good approach, considering that theymos also initiated that topic, where his intention was to
Due to the possibility of actual violence from him, it may be worthwhile to compile a dossier on him and report him to the relevant authorities.
So, in this case, perhaps he wanted to keep somewhere posts made by humanrightsfoundation's alternative account too... Or maybe he kept these posts until finding a way to make sure if that account was indeed an alt account of humanrightsfoundation... who knows. Anyway, the important part is that we found out why those posts still appear on AIbotBTC's profile. I think I can close the topic now.
The only inconsistency remaining is the one spotted by Halab, but I think it's too minor to keep the topic open.
Thank you all for helping in understanding this issue!