Even though BPIP not showed he's get banned, but I trust the moderator in this case since he have a button to ban someone.
The user Symmetrick has been banned, so haters of this user can breathe a sigh of relief. So discussion of this issue has lost its relevance.
I do completely understand how the ban on mixer works. Not only advertising the mixer in signatures or avatars, but if you mention the URL link, you will get banned too.