I can see "virtue signaling" if the chief motivation is to actually signal your virtue to an unrelated audience for the purpose of rewards.

But that's different than a scenario where someone is proportionately reacting to something outrageous by sticking up for someone to the actual offender, or sticking up for someone to the group that can resolve the offense. Those situations seem more analogous to outrage in professional situations when people targeting their actions in a way that might actually help bring about a positive change. (As opposed to posting it on Instagram.)

I think our chemical reward mechanisms are more often hacked by rewarding promotion of conflict, rather than rewarding promotion of resolution.