I have a bell - it does come in handy. Just yesterday morning this ******bag wouldn't step back out of the way no matter how much I rang it (he was standing in an intersection, I had a green light) ... apparently he thought me and my bell should go into traffic blindly to avoid his lordly presence... he had another thing coming (bam !)

I used to have one of those cheesy goose honk horns with the rubber squeeze bulb but it was hard to mount and I kept banging into it with various parts of my anatomy, so that was the end of that...