This will only result in more sophisticated parked domain sites. That's what happens to phone numbers - companies buy phone numbers and put whatever trash phone services they can on them just to say "see we're using it for business we've got some pre-recorded phonesex running there".
If someone can go to the domain and buy the domain, you lose the domain. It doesn't matter what else is there. If doesn't matter if nothing else is there. What matters is that something isn't: The ability to buy the domain.
That means Joe Schmoe can't go to the domain, put in his credit card number and enrich the scalper. Because if he can, they lose the domain.
If they come up with some convoluted scam to get around it, they'll get less business and scare away buyers who perceive it to be the subterfuge that it is, which is good.
The best thing about it is the low cost to honest people not trying to sell domains for money, who shouldn't be affected at all.
