It's not so much about reporting red bar... Like CarpentryHero said below, I report people if they're red bar and dealing damage but not taking it... And it has to be sustained gameplay. As we know it can be the servers or other factors, so I give people a chance. I know for a fact that I shouldn't get red bar, I've got an ok connection by Australian standards, but as soon as you get onto certain servers, things go to s#it...