Can you imagine a Brit in America encountering a billboard saying 'Has anything good come from Britain?' and bursting into tears? It just wouldn't happen. We don't take ourselves so seriously.
Actually, if you read my original post you will see that I wrote that I "teared up." Not quite sobbing in the back of the cab. And I wouldn't keep bragging about your ability to laugh at yourself. If you really had that ability, you and several others on this thread would have not reacted with the volcanic fury you are so readily expressing.
It would be interesting to know who paid for that billboard in the UK knocking America. The Muslim terrorists have plenty of big oil money to throw around on things to foment trouble between friends.