Yes, flies land in doggy poo and buzz annoyingly around your head, but do they deserve to have what amounts as acid sprayed on their bodies and left to die of horrific burns?
It will be the same for us being sprayed with hydrochloric acid and left to melt in the gutter.
I say this because their is a bloody great blue bottle buzzing around my home and I know their is some RAID fly spray in my cupboard.
Because Fly's spread disease, in the home, they should be killed, but I use a Swat, and before I use it, as they have a right to life, I give the Fly a chance, 'You have one hour to get out, or your dead', after the hour, I put on my Bush Hat, so it knows I mean business, and go after it.
Its murder!! Just try to ignore it, or make friends with it! flies have just as much right to be here as we do! But then again i am a "be good to the world" tree huggin spiritual kinda person