"Going out to Dusseldorf for work.

Flying British Airways, leaving from terminal 5.

Go through security, get pulled to the side. I'm wearing a French
Connection Transformers t-shirt. Bloke starts joking with me is that
Megatron. Then he explains that since Megatron is holding a gun, I'm
not allowed to fly. WTF? It's a 40 foot tall cartoon robot with a gun
as an arm. There is no way this shirt is offensive in any way, and
what I'm going to use the shirt to pretend I have a gun?

Now here's the stupid part. I was only taking carry on luggage, so my
clothes were in my bag, so I said I'd get changed. So I stripped off
at security and changed t-shirts, putting the "offensive" t-shirt in
my bag. Now I haven't been a dick so far, I've done what they've said.
No point in arguing with the drones.

The supervisor comes over and is now a dick to me, telling me if I put
the shirt on I'll be arrested. I then told him that I wasn't going to
waste time arguing with him and he wasn't worth the effort and didn't
have any power to change anything anyway. With hindsight I should have
said, yeah arrest me, great publicity for you guys to arrest a bloke
wearing a transformers t-shirt."

And here's a picture of the "offending" t-shirt.
http://shorterlink.com/?RYZL06
Tossers.