My favorite is getting the question:
So, what happens when we go over our license limit?
... and the response is always:
You'd be running in an unsupported configuration and we would make a best effort to assist you, however if we needed to escalate to RIM for assistance they would most likely request log files, which would show a lack of licenses in your environment.
the retort: Yeah, but will it still work?
and the comeback: unfortunately, generally yes.
Its a bit difficult to keep people in line with their licensing if the seller of the licensing doesn't attempt to enforce it. Oh look, here's a CAL, let me put it in every BlackBerry Domain I have ... I just got free licenses; OY!