Doesn't take a genius to understand that being in a regiment for one day isn't really considered as something you should be listing while being asked which regiment you have been part of. You are not part of anything after one or two days, takes a bit longer.
On the other hand, no need to take the piss out of 'all' the regiments he listed because as some people accurately pointed it out, he has indeed been part of most of them, even if it wasn't for long. If you are going to run a vendetta on reg-hoppers, remember that you also have a lot of leaders acting like complete hypocrites only to gain one member when it actually suits them. I perfectly remember when Vetro joined the 3eVolt, he already had built himself quite a solid reputation of not sticking around for too long, and yet he was accepted without too much trouble by Asian. If you can't accept the fact he listed it, maybe you shouldn't have let him join in the first place.
Edit: For the record, since it seems to have confused some people, I am not calling Asian an hypocrite (I don't see him complaining on this thread about Vetro listing the 3eVolt). Just implied that in most situation, everything is not either black or white.