The net result of 5 pages of discussion being..... There is no hard/fast/one-size-fits-all solution. The going-over of all these considerations gives everyone a much firmer grasp on the variables of such scenarios, and hopefully time won't be spent pondering them should the go/no-go situation arise.
Locally last year, a young man was in the back of his house watching TV one night when the police started staving his front door in. A couple days prior, the police had sent a CI to the property to verify that the guy had a few pot plants in his garage, and the CI broke in and stole them. The subject of the investigation, thinking that he was about to experience a home invasion, fired one shot, killing a young police officer. A father. A husband. A son. It was, and still is, f*cking tragic.
I don't smoke dope, and I don't support it, and I'm not trying to place blame, simply highlight the fact that ultimately, the trigger pull is yours, and your alone, and you can't take bullets back.