The facts, as they stand, are:

1. Yes, I have a long black coat. I like it. It's comfortable and warm. I look good in it.
2. Yes, the stupid morons who took out Columbine also wore long black coats.
3. Yes, the characters in The Matrix wore long black coats.
4. Yes, the Columbine idiots and the Matrix characters wore long black leather coats.
5. No, my coat is not leather, it's made of merino wool and clearly looks it.
6. No, I am not carrying any weaponry, nor am I planning on doing so anytime in the near future.
7. No, I especially was not planning on doing all of my grocery shopping (as evidenced by the mostly full shopping cart I was pushing) and then going up to the front of the store and start shooting people. And that would be especially hard seeing as how I don't have a gun.
8. No, this is not the first time I've been asked if I'm carrying a weapon.
9. Yes, there really are some stupid people around. Long black coat does not equal rampant murderer. I'd like to see you go up to some executive or someone else dressed in this kind of coat (since I've often seen people of such stature out on their lunch breaks wearing these coats over their suits) and ask them if they're carrying.