About bugs.. pest

I killed a lot of flies yesterday. I'd like to think that I didn't kill any relatives of the ones that's still alive.
It's not even a butterfly effect, it's not that far fetched. And we also got the Karma the one we think as in a general sense.

I do what I can, I let 'em go into the wild and who knows, maybe a second later, a big scary bird will get them. Such is a life for any of us.

To Raid them or not... they are sometimes a lot smarter than us, hive mind and all that stuff.

ETA:
I got a couple of spidies living right out side of my doors. They can stay. When I come home to this lonely place from work, I talk to them. I don't know if it's their bed time or not, do they sleep walk? They are pretty active around the midnight, one thing they shouldn't do though is to dangle right in front of my face to play with me. Is this me describing myself in an odd way?...