Opossum is about the only animal that escapes my live trap alive. They may be ugly but they're absolutely harmless and do a great job of cleaning up the other dead stuff that finds its way here. My trash goes into a metal dumpster so that's not an issue. I'm not breeding them and not encouraging them to hang around but wouldn't go out of my way to kill one either. About their only crime is being ugly and I'm as guilty of that as they are. I did have one show up late last winter. Most every day, just before dark, he would wander up the drive from the field behind the house and make his way to the bird feeders in the front yard. He cleaned up the feed the birds had spilled on the ground during the day and headed back for the field. Crazy thing was fun to watch.