people seem to turn stupid about what a fucking bike lane is. it seems to mean, "pull into it when you want to turn that way or if you have a new car or are very intimidated about traffic getting too close to you."
I used to have an air horn on my bike - I may return to this for those cars.
Best thing about biking in Oxford - cycling home along the river, on the gravel pathways, after a couple of pints at the gay bar. Totally dark. In places can't see a thing. I find this amusing and slightly thrilling. I remember cycling on the gulf islands at night when visiting friends and camping - the same thrill of cycling in the complete dark...[/QUOTE]
As I live in one of the top ten bicycle progressive cities, we even have police on bicycles....it is against the law to pull up on the left of a bicylist
and then make a right hand turn (essentially they'd run us over, common sense right?) but it happens all the time and I wonder just how the law is enforced. Anyhow, I wear a bright yellow, glow in the dark vest and people are so distracted, sometimes they still don't see me. So, just like you ...I have the air horn and I have annoying turn signals. Although they don't flash, they beep (air horn tweeps) I use arm signals with out fail, and obey all traffic laws. Recently, a distracted driver was doing all kinds of stupid things and I had to blast the air horn at him, and then he was all swivel neck and finally saw me (as if I had just committed a crime, he copped an attitude) I arm signaled I was turning left and put the turn signal tweeps on.....he then pulled up beside me and yelled out the window *you're fucking kidding me right?* 
It's always the guilty screaming victim. I ignored him, and he drove off. So yes, get that air horn back on that bike. Your life is more important. People are too busy
with dash board dining, talking on the phone, texting- I often wonder who is driving the car. I don't care how obnoxious my bicycle is. If you can't see me, you will hear me.