Any religion that states that it is not a religion is, without any doubt, an abuse of the system, in the same way that, for a time, any non-Order message that stated "This is an order" would get you lightning bolted.
Any religion that rejects the existence of gods, spirits, or any other supernatural influence on the material world is also an abuse.
I'd say that any religion that fundamentally advocates supporting one particular realm or group of realms—not because they follow the religion, but simply because they are who they are—is probably abusive, too. (And note that "fundamentally advocates" is different from "has a policy of supporting." Just because a religion supports a particular realm doesn't mean it falls under this category, but if it's part of the actual tenets of "belief" that the religion preaches, then it does.)