In case you weren't already aware, Banksy has his fair share of detractors. While most of them might be general street art haters, his main nemesis is actually a rival.
We've educated you on the feud before when King Robbo's work was displayed in an exhibition but this week, the rivalry got serious. Well, seriousish.
One of Banksy's most famous pieces was painted over and then tagged by 'Team Robbo'. The original showed a police marksmen and a kid about to pop a paper bag behind him whereas the new piece shows lots of squiggles and colouring in. Ermmm, good one Team Robbo.
Bristol City Council have helped repair defaced Banksy works before but haven't revealed yet if they'll get involved again.
Banksy, whoever you are, we're staying on your side.
(Images: SWNS, Rex Features)