I've seen a few QC t-shirts around and about.
Someone wearing a Bear hoodie at uni last year. Someone else wearing the Hannelore phobias t-shirt. One or two "teh" t-shirts in the city and a year or so back I served a guy wearing an "Evolution Kills" t-shirt.
I totally want to get a "Science is a Verb Now" t-shirt for when I'm teaching.
(Apologies for the thread necromancy, didn't realise this was an older thread).