Extreme philosophical discussion

I unwittingly brought a brown marmorated stink bug home from Raleigh at Christmastime. It was secreted in some old songbooks my niece had that I thought could sell on eBay (indeed the music sheet for Simon and Garfunkel's Bridge Over Troubled Water can go for 10-15 bucks, but I digress).

Being the bleeding heart that I am, I took a likin' to it and put it on a shelf on the steps to my basement and forgot about it. This morning it was back, exploring my kitchen. After googling and initially reading something disturbing about human health, I put it in a plastic tub for safe keeping.

Alas, although they are agricultural pests and can become a nuisance in homes, they don't bite, damage houses or spread disease. I have a lone bug that seemingly would have no way of mating. A map of their spread — which started in the late 90s when they were accidentally introduced to the Mid-Atlantic states from Asia — shows no data about these bugs' existence in northern PA.

https://www.epa.gov/safepestcontrol/brown-marmorated-stink-bug

Anywho... should I squash the thing? Would I be justified? Is all life precious? If I don't, could I visit a plague on crops around here? Should economic concerns be weighed in a life and death decision such as this?

All creatures, great and small