Boxing, UFC, hockey and other contact sports where it doesn’t cause a penalty.

As a rule, I do not give license for violence under any circumstances, as that license could be mis-interpreted or abused. I will say you cannot justify it, but it can be unavoidable. Trust your judgement.

Self-defense only when in imminent, life-threatening danger.

This thread is worthless because many possible answers would be censored for violating Lemmy.world TOS. There can be no meaningful debate on this topic here.

Historically, against Nazis.