On Old KC (rest in ribs) I once made an offhand comment that Europeans believe anything about America as long as it conforms to their notions of how stupid and horrible we are. I said for example if someone made a thread "How much do you tip the person who bags your groceries at WalMart? I tip only 10% and it makes my friends angry" that such a thread would get a hundred replies.
A few minutes later someone made such a thread that was active for days and with hundreds of posts, most of the posts coming from Europeans and saying how stupid tipping the bag person at the grocery store is.