I'm not sure that this issue, to the extent that it is an issue, is something TB can deal with - it's really a case of how certain members conduct themselves.
TB could suggest Randy create some 'ambassador' programme or other and he may well agree - but those members who are rather less than accomodating to newbies are hardly likely to be the ambassadors so the problem would remain. Albeit hopefully the 'good' would start to outweigh the 'bad' - not that I don;t think it doesn't alreaddy.
The only real solution is in terms of moderation - which is obviously not TB's thing. At best TB could perhaps look to get Randy to tighten to TOS - but it would be a very difficult thing to try and define and the simple fact is that some people will always be more/less welcoming than others.