Or it could also be, and I know this is REALLY WAY OUT THERE, his friend might not appreciate his real name being splashed around on a marijuana grow site just to satisfy a couple of doubters on said site. I couldn't make the argument on his actual existence or not, but I think it's fairly naive to even ask for it in the first place.
I can see that conversation now. "Oh by the way I gave your real name out on RIU.org" ... "RIU, what's that?"..."It's this marijuana grow site I'm on all the time"..."ARE YOU FU**ING KIDDING ME?"... "Well these two guys didn't believe you existed and I damn sure wasn't going to let them get away with that"... "Oh, well in that case I understand"
Sweet can of corn, dude, you insult your own intelligence by asking for ANYONE'S real name on this forum.