You just said it

"We have more than 250 million guns in this country, and not all of those guns are in the hands of rational people," says Jim Sollo, vice president of the Virginia Center for Public Safety, a gun control advocacy group.
http://www.usnews.com/articles/news/politics/2008/03/06/in-congress-the-uphill-battle-for-gun-control.html

Since there are inrational people with guns, & inrational people seem to not follow the law, perhaps that's why the rest of us should have guns?
Many can chose to be a victim, but I for one will not make that choice, I will not quietly go into the night.