Stuff like that can happen in a Third World banana republic.
And it can happen in the First World too. There are lots of things some foreign tv producer could do to provoke an angry response from Americans - you could put a bumper sticker on your car praising Bin Laden, or maybe a bumper sticker praising General Sherman while you drive through Georgia. I'm sure if you try hard enough you can provoke a mob to throw crap at you. It's childish and stupid, but if your only goal is higher ratings, why not.
They tried to provoke the same response by painting pro-gay and pro-Hillary slogans on their cars and then driving through Alabama. They failed.
Little Germany does not like England.