What would you do?

[Adam]

Originally Posted by Nevadaref

Now if you want to be precise, your reply above contains a generality which should be cleaned up. Not just any act which causes an opponent to retaliate by fighting would get classified by rule as fighting itself, but rather only an unsporting act which causes that retaliation. So if an official did not deem the attempted trip to be unsporting or an actual trip involving contact (perhaps the official only charged a personal foul), then any fighting retaliation would not cause the original fouler to be automatically DQ'd by rule.

Interesting.
B1 swipes at A1's foot and misses (official rules this an unsporting technical foul), A2 retaliates with a punch.

B1 swipes at A1's foot and makes contact (intentional foul), A2 retaliates with a punch.

We only get to toss them both if B1 misses.