Just because you feel safe with 6 shots doesn't mean I do. Multiple intruders or assailants is a very real possibility and individuals under the effects of various substances have been shot multiple times with little immediate effect on stopping the threat they pose. Do I expect to ever have to use my firearms for such a situation? Nope. But I can't help but go back to the age old "I'd rather have it and not need it than need it and not have it..."
Let's face the facts here... criminals don't care about the laws. Any gun related legislation primarily effects the law abiding citizens who use their firearms for recreation and/or personal protection and have no dark intent behind their ownership. For those of you who have never purchased a firearm... here's a copy of the FEDERAL form the BATFE requires be completed for the sale of any firearm by a licensed dealer:
http://www.atf.gov/forms/download/atf-f-4473-1.pdf -- If you take a look at the question 11 and its sub-questions you'll see the list of automatic disqualifiers for the purchase... answer "no" to a or "yes" to any of b-k and you're not able to complete the purchase/sale. After this form is completed the dealer then calls in all of the information and gets either a "Proceed", "Hold", or "No" on the sale as a final check via federal databases. During a private sale (possible only with residents of the same state -- if from different states the transaction must be middle-manned by a licensed FFL), the seller attests that to the best of their knowledge the buyer is legally able to make the purchase and the seller attests the same. If any of these conditions are not met, you're looking at an illegal transaction which is beyond the scope of "legal gun ownership". Basically, my point here is that a vast majority of gun owners have to hold themselves to a higher standard than non-gun owners or else they put their legal ownership at risk.