So, a closed source operating system can do things the user can't control? I don't know what's more impressive, the fact people don't apprehend this reality, or the fact people still rely on VPNs (especially a third party) for privacy or whatever.

Probably start caring about what's on your plate before which bugs you squash, if you vow to care about consciousness, suffering and other beings.

That is because you would be acting in legitimate self-defense squashing the mosquito - the only time violence is acceptable. All other violent acts are in karmic vain.

Defence of your friends? Or of strangers?

Otherwise we can just be picked off one by one.

but is it justified self-defense to respond to a tiny bite with lethal kinetic force?

Yes, because there's no option to negotiate, placate or convince the mosquito to leave. The bites can cause allergic reactions, and even just a nasty itchy bite lasts a quarter of their lifetime. I get nasty reactions when they bite my hands that last for longer than the mosquito lives as an adult!

And it can be even worse, in some areas of the world a mosquito bite can indirectly kill you. I think it's pretty much the only situation where it's justified. Unless we can invent a better solution at least.