Or ending a life for trivial reasons e.g. swatting a musquito or fly because you find it annoying, killing a roach just because it happens to wander into your h

Or ending a life for trivial reasons e.g. swatting a musquito or fly because you find it annoying, killing a roach just because it happens to wander into your house. Uprooting weeds and killing them because you don't like the look of weeds in your flower garden etc etc. When is it justified, everyone draws their own line I suppose.