Hope that it doesn't come to that. Might come down to a game dev making a non-pay version for those who want them for entertainment purposes and not gambling.
It's not just SL, I noticed in a MMO I play, they used to have "bags" awarded by a NPC that would issued up to 1m gold, but those were removed. According to their patch notes, it was done due to requests by a few U.S. states that prohibet gambling, although unlike SL, you can't take gold out of the game for cash monies.