On legal grounds they have to object. If not they lose the rights to the trademark if they ever need to go to court to fight a case. Their lawyers would be the one jumping up and down and for good reason. They have to keep their trademark (or lose the rights to it by simply not objecting others usage of it)
True, if that's what they were doing. Look, this is a legal tactic. It amounts to having your friend who's a lawyer call your mechanic because you have a gripe and want your $100 bill reduced. They know CentOS will not go to court over this. So this is a way to get them to back off. But CentOS isn't doing anything wrong or illegal. For that reason, they should ignore this but I understand why they can't take the risk. Defending RH's actions is just futile. I, for one, am very disappointed. I can hope bad press will help but they seem to not really give a fsck.
-- <<JAV>>