You're certainly getting rather evangelical there buddy.By your reason, then every
single registrar's actions are 'unacceptable' because through their 'complicity'
they accepted generic words and the word of their customers that their trademarks
were legitimate.
Can you show me a single registrar that has not registered domains
from lying customers? If you were the registrar, would you have said, 'nope, sorry
can't take your money because I don't believe that you really own that generic'?
It'd be a bad business move to do so, not just because you would have missed out
on a few thousand bucks (or more). In the offbeat chance that that the client really
did own the trademark(s) for the word(s) and you denied them service (let's face
it, it's not exactly easy to check TMs online), you could be sued big-time for neglect
to carry out your contractual duty.
Perhaps the wisest registrars were the ones
that simply refused to take any sunrise registrations, but that's a moot point.
Overall,
this is a policy decision and whether Joker.com 'believes [the domains] to be fake'
is irrelevant. He has, in fact, issued a statement to registrants, and the fact that
some have lost the name already at the WIPO, is probably proportionately no different
to other registrars.