Umm... I don't think my comments are based on no grounds. I've not killed anyone or shot at anyone, please refrain from asking questions like that, its rather insulting. But been shooting with rifles for the past 10 years, practising legally of course. Why were guns invented in the first place? Its a good point for debate. A gun is a weapon and there are reasons why we shouldn't allow people to own them easily.
A robber with a gun is a criminal, a policeman with a gun is a protector. It is subjective on whether it can be used to do good or bad. How many shooting cases are there in US? Compare that with Singapore. If guns were freely available I'm sure you'd have a lot more gun related violence. Do not be over protective because you own a gun.