That's rather odd, freedom of speech and all that. You can talk about anything you wish doesn't give them the right to ban you.
no such thing as freedom of speech in any country, just the illusion of freedom of speech.
and its quite regular from my GW experiences, that was the most extreme case, but I know allot of GW stores that I've been to don't allow it, or frown upon it, they don't seem to like the fact a world exists outside there doors.
and I know soemone is gonna stick up for them and go "well its only fair you can't talk about none GW products in a GW, its promoting other products", but since I can talk about warhammer in ASDA, or Game, or gamestation or anywhere I like, then your wrong..