Sam has given detailed explanations about the circumstances of his banning at the other site.
He also said that at the time he was banned he was planning on leaving. So, other than having been subjected to rude and arbitrary and unnecessary treatment, and no communication, the issue was for him at that time moot.

As some time has passed, it might be that he might wish to return.

It would only be decent of the system if a person was given that option.

The present practice of sudden, secret, arbitrary, no explanation, no appeal, very inconsistent interpretation and application of the TOS is not decent.