I love the gun arguments myself. Anti gunners ask "Why do you need a gun that shoots 30 rounds?" I answer with "Why do you need a car capable of doing 125 mph in stock form? Why do you need a house with 2 extra bedrooms and 3 extra bathrooms? Why do you need a 65" plasma TV?" Then they usually tried to change the subject, because they know they aren't going to win the argument.
I once watched a 2nd amendment video on Youtube and some anti gunnut said "The 2nd amendment is over 200 years old. It's outdated and needs to be changed." I replied with, so Freedom of Speech, Freedom of Religion, the Right to Assemble, etc are all outdated and needs to be changed since they are also over 200 years old?" I never did get a response. Funny how that is.