That shouldn't discount the fact that you have to remove the tag, the reason that s/he might have went offline is because s/he was waiting for you to remove the tag. You didn't say anything about @micle00 that s/he should be posting in the forum despite the negative trusts. You said that you will put a neutral tag and I think that it will be enough for many people to keep an eye out for @micle00.
Oh really, I
have to remove the tag?
How else to decide whether @micle00 learned anything from the mistake, other than from her activity on the forum, and since there was no activity on the forum, I can make that decision. As simple as that.
On top of that, I am still waiting and answer to my question about connection with sock puppet accounts and thread shilling. So yeah, tag stays for now.