Hehe! They should have done this prior to getting into using the OGL
and OGC as part of their business model. If they haven't, then that
is their fault and potential problems.
I think, in part, people can protect themselves through blanket statements like "All trademarks of WotC listed in this document are to be considered Product Identity." If this were followed by a list of trademarks, then if they slipped up and left off a trademark then they'd be guilty of unclearly designating their PI (for which there is a cure), rather than accidentally releasing something they have the authority to release (for which there may not be a cure in some circumstances).
Lee
