IMHO, if I were a large company, and someone tried to use my mark in such a way, I would simply sue them for trademark infringement. The registrar in this case... it's worked in suits against google in terms of advertising, and I'm pretty sure it would hold up here.

In this case, I'm pretty sure a corporation protecting its' mark would win, and that it'd likely cost more than $2500. But for a corporation with a dedicated team of lawyers on-staff not a big deal.