I do not understand the hysteria about bells - personaly if I am on a shared path where there are pedestrians I prefer a few bars of Bohemian Rhapsody as I approach - soon attracts the attention of all but the ipod zombies - but having read the first part of this thread last night I lodged a bell on the handlebars for my ride to the gym - no less or more effectivea and did not feel particulaly aggressive - nor did it elucidate aggressive responses from the recipricants - I Have always fancied an airzound but have decided it is a piece of clutter too far and I would probably only ever use it in retaliation against drivers - I think I will probably stick to murdering the collective works of Mr Mercury and his mates