I don't like the idea either, and I think most don't... but we also never know what we are capable of doing until we are in any given situation...
I never thought I could ever shoot someone's dog... last year our neighbors 2 dogs got out twice in 2 days... I lost 47 birds in that time, slaughtered for fun... they tore though welded wire, hardware cloth, all of it... neighbors response was that they were bird dogs doing what bird dogs do... sheriff responded and his advice was that I had a right to protect my property in any way I see fit, lethal force included... this year when one of them got out again, I didn't wait for it to kill a second bird...
Am I proud of that? Nope... but neither will I be ashamed of doing what was necessary and legal to protect my charges...
And just an FYI... in most states it is highly illegal to relocate possums, raccoons, skunks, etc... check your state laws before doing so, please... and unless you live within city limits, animal control usually won't deal with them... so most times if you trap it, you are required by law to dispose of it...