Shout them down in every space, make them embarrased to think the stupid shit they think.
If we don't embarrass and correct them now we will have to kill them later when they come for our friends and families.
Depends on the band, I guess. Been to some punk stuff and it was really mixed. Metallica was the biggest metal show I’ve been to, there were different ethnicities in the crowd, but I would have felt kinda uncomfortable were I them. E: TBC I felt uncomfortable by what I saw.