So I suppose Jeff and others who support this policy have already instituted a policy where they refuse to sell to someone early unless they know the person is actually working the booth attributable to the badge they have? (sorry for tangled pronouns, but you get my gist). I know one dealer was person_without_enough_empathying and moaning to someone while I was in earshot, about all the guys in the show early with dealer badges. But he didn't hesitate to take my money. People love the buyers but they hate the competition to buy.
Also, I have considered buying a dealer space for the sole purpose of getting the badges. That said, I echo October's sentiments above. That is, buying at cons is pretty hit and miss nowadays, even with early entrance, after you factor in all the costs.