Anything involving Mel Gibson. Especially if he can show "the English" in a bad light..
Let's just go with Braveheart
1. Blue face paint? Er, no... That was the Picts (more than a thousand years earlier)
2. Kilts? No. Not yet. Come back in about 300 years. Maybe 500
3. Wallace as a farmer/peasant? No. He was from a knightly family. He would have had extensive military training.
4. Romance with a French princess? No. She was 13 when Wallace was executed/dismembered
5. Braveheart was Wallace's nickname? No. That was Robert the Bruce
6. Edward Longshanks and Wallace died at the same time? No. (1307 and 1305, respectively)
7. Edward II (Longshank's son) was stereotypically gay? No. He MIGHT have been homosexual, and there were definitely rumours. But he wasn't particularly effeminate and had at least 4 kids with his wife - and was rumoured to have a couple of heterosexual affairs.
8. The Scots sacked YORK? No. That was Carlisle. {God knows why Gibson would change this}
Now, if I was to start on "The Patriot" ...we'd be here all day. Where are all the black slaves? Where are the thousands of French Soldiers? Where's Baron Friedrich von Steuben? etctera, etcetera....