I carry a 5 inch knife with me for protection. Where I was born, protection wasn't even thought of, it still isn't, but within 6 months of moving to Canada I got jumped by 3 unknown people, for no reason. I was just minding my own business when they came up to me and stomped my head in.

I recieved over 20 punches and 30 kicks to the head, so since that day, I have felt the need to carry one and slide the cold steel in anyone who tries to do that to me again.

I'm not paranoid, but these days, it is needed.