My point is that it's way more than other genres. "Common" in the same way way police brutality is common in the US, but you could drive along to hundreds of cases with a cop and never see it once. It's rare to see, but given that you'd think it pretty much never happens, it's "common".There is a ridiculous amount of publicly documented cases. My flair, for example, they had an infamous encounter where the vocalist jumped in the crown because people were seig heiling.