Depending on the context you should take responsibility in both circumstances.
Crossing your own line is obvious. But you should still take responsibility when crossing someone else's if you feel they're acting in good faith / being reasonable about the offense, even if you disagree with them. And probably another caveat or two I can't think of off the top of my head.
Crossing your own line is obvious. But you should still take responsibility when crossing someone else's if you feel they're acting in good faith / being reasonable about the offense, even if you disagree with them. And probably another caveat or two I can't think of off the top of my head.