He should go through the regular +1's/-1's as anyone returning the clan would. Unless Nom feels like this should be a special case, let the community of TF2 decide if he can (re?)join the clan. If you feel he hasn't matured, then -1. I like discussion, but I feel this isn't doing much other than combating the same ideas back and forth.
On a side note.... I realize he used to play on our servers, but was he a member back then? If so, that changes the process of getting accepted a bit. Also, any discussion to this extent and with the lack of real conversation going on. Please either talk on teamspeak or just steam message each other. Because it's slowly become a 8 page thread of mostly 3 people.