I am not a gun owner but I believe strongly in the US's Second Amendment (the right to bear arms.)

What if someone walks up behind you, sticks a gun in your back...
What if someone comes into your house with a gun, intending to kill you and rape your wife...?
What if there is a madman running through your college with guns, killing random people?

We can make up scenarios all day. There is more than one situation where to have a gun would be good. You can better defend yourself against armed violence with arms.

On gun bans: When you take guns away from the good-law abiding citizens, the people left with the guns are the criminals, and police. Any good law abiding citizen who keeps their gun has suddenly become a criminal. Sound familiar? Look at yourself, look around you. You are a criminal, you drug addict, you pothead.

When the populace is well-armed, violent crime decreases.

Another good reason to own a gun is defense against tyranny. What did the Nazis do before rounding up the Jews? They took their guns, so they couldn't fight back. Do you think our governments are possibly devolving into tyranny? Socrates said, "Tyranny rises out of democracy, and the most extreme forms of oppression and slavery out the most extreme liberty."

A lot of the crime around here is caused by fugitives of the law from other countries coming here to hide. I wouldn't even call them illegal immigrants, they are just bastards. Around Cape Cod, it seems Hyannis and Bourne can be pretty nasty at times. Where I grew up in Hawaii, Chinatown was pretty nasty. There are a lot of crack whores wandering around, and homeless people out of their minds addicted to meth. Probably the most dangerous place on Oahu at night, Palolo Valley projects. When I lived there, the Bloods and Crips were pretty big. There were a lot of posers, but a lot of real gangs. One of my buddies was in the Bloods, and he killed someone because he was a big drug dealer in the Crips. But, Hawaii is a pretty nonviolent state. People are more likely to punch you in the face than shoot you in the back.