I know what you are saying, N, but there is nothing "in-game" about the currency that gets transacted through the RMAH. The items are in-game, the money is not.
Yes, they have it set up so you can transfer the money to Paypal (or whatever), but only if specify that option up front for the auction (at least that is my understand from what people have posted here). Is that perfectly clear to people? It seems not as people thought they could transfer their balance to Paypay and that's not the case.
It's kind of like if e-bay said you can sell stuff here, but unless you tell us otherwise, and pay a transfer fee, all the money you make can only be used to buy e-bay sponsored items.
I was just pondering whether there may be litigation brought against Blizzard (or anyone else with a RMAH) in the future.
Anyway .... I'm still having a lot of fun in the game and even though it gets frustrating sometimes, I'll keep playing. Now if only people would buy my crap in the GAH ....