I may be in the minority but all my life I've tried to be as kind as possible to all the lovely creatures on this beautiful planet we call the Earth. I even pass this on to my kids and neither one will even crush a cockroach but trap it and turn it loose.
And, who knows, there's bound to be a nuclear war one day and a few of us might just survive. Then, when those 100 zillion cockroaches try to finish the rest of us off, one might cry out, "Not THAT family! They were kind to Grandpa Flurp!"