I think banning - which is what the euphemistically termed "permanent suspension" comes down to - should be reserved for people like Baldrick Cunningplan. We want debate, not abuse. But how bad is Randman really?
In the message that got him banned he even stated his intention of bowing out of that particular discussion, because he didn't want to risk being banned. He also said he wasn't trying to be malicious. I believe he meant it.
There may have been many moments when Randman was perilously close to the edge, but I think this wasn't one of them, and I would ask the admins to reconsider.