[rich2202]

I think of it from the perspective of the bot receiving the damage. Once they violate my frame perimeter, then all bets are off. They are taking the risk, and if they damage me, then the penalty is fully on them.

If you require robots to sustain contact within the frame perimeter without damage, that is imposing a much higher level of design (and weight).

If I design my bot to stay within the frame perimeter, then I am not at risk of causing damage to other robots. If I choose to extend outside the frame perimeter, then it is on me to make sure that I do not inadvertently damage other robots.