Cristina,
I am surrounded by people who thought I was crazy but have asked me for things so many times that they no longer make comments.
How about these...
"I don't like to feel helpless when I see someone who needs help."
"I used to carry an AK-47 in the trunk of my car but I've gotten slack in my level of preparedness. Now I'm only able to handle those things which come up on a DAILY basis."
"I carry all this stuff because you have no foresight of your own."
Back in PA I have a carry permit. I get lots of abuse about it from certain people. The best come-back I ever heard was this.
"Miss, have YOU ever been bound hand and foot, beaten uncounscious and left to die in a ditch?"
"No."
"Well, I haven't either but I'd imagine it would suck."
Be creative,
Mac