First, getting involved in a violent confrontation to protect property is not something I'm willing to do. If someone is being hurt, that's one of those situations which has no good options, either doing nothing while that person is getting hurt or involving yourself and getting hurt or worse yourself. I was also one of those young patrolmen who thought nothing of jumping into those situations, fortunately without any bad results. I can't say with 100% certainty what I'd do if I saw someone getting hurt now, but I'm 57 and am almost recovered from back and neck problems so fighting isn't something I'm up for, have no legal authority as I'm no longer a LEO and have kids I'm responsible for. My 13 year old in particular would be in trouble if something happened to me. I'm more likely than not calling 911 and letting the police handle it.