here's the logic:
If, advertisers didn't/don't pay feed providers for tm names,
then there would be no market for them.
that is the basic philosophy which drives the registration/renewals and reselling of those types of names.
many names have already ben blocked from most ppc services, however advertisers still purchase links and pay for traffic coming for "tm" domains, because to a certain extent...it benefits them. the benefit is that they receive "targeted traffic" looking for their products or services, which is verified by the click thru rates on those type of domains.
they could confiscate the domains, but then there is cost to acquire, then cost to maintain.
is that cost more or less than the "benefits" they may receive by "ignoring" the dn owner?
sure, on the surface, it may not look pretty or legit, but folks on both sides are making money, which stimulates economy's outside and inside of domaining.
all that said, imo...i say No!
let the marketplace determine the fate of domains in general, as it has in the past, let it be so in the future.