[quote=Apokalipse]
It's not about opinion, it's about how it is in the Harry Potter universe. In the Harry Potter universe, physical violence does happen magical or no. There is no evidence that they relate physical violence to muggles, so please don't act like it is cannon based on opinion. If you have hard evidence of it being mentioned by J.K. Rowling in the books or otherwise, then it will be considered cannon.
[/quote]

 mcgonagall did scold Harry, Fred and George for using physical violence and she referred to it has muggle fighting.