You're the one saying that guns work as a deterrent. Well, do they or don't they? I could say the same. If you want to defend yourself, get a bullet proof vest, not a gun.

If the bomb should go off by accident I suppose that I do have to pay restitution to those affected, but that's a risk I'm willing to take.

Well, I have seen criminals in prison saying they were scared shitless of armed victims, and that they sought softer targets if they knew their victims could defend themselves. So shove your pro-criminal safety BS where the sun don't shine, because that's the only place it can survive.