Finally found it ... Apparently they deleted for someone in the past and I also see another guy with a thread that his account is no longer clickable although the thread he made is still there, not sure what their reasons were

Link: https://bitcointalk.org/index.php?topic=43648.0

We don't delete accounts anymore, because it is quite a bit of work. Before an account is deleted, theymos has to do at least the following:
1) Make sure that the account wasn't hacked.
2) Check for any existing scam accusations against the person.
3) Check their outbound PMs for scammy behavior.

This is a long, painful process, so theymos just doesn't do it anymore.