Nothing bugs me more than seeing a total clusterf* of traffic caused by some fool when no one is beeping their horn. If you are driving like an idiot or causing other people strife because you don’t know what you’re doing, then you deserve to be startled by someone else’s horn. I’ve been beeped at many times in my life and I am willing to admit that at least 90% of the time, it was because I had done something dumb. It is a reminder that a) you are not the only person on the road and b) you are being stupid and inconveniencing others.
Example: the other day I was on my way home from work and in the right lane, which is always a pain because it’s the most congested lane in this particular intersection and people make it worse by cutting you off at the last minute. On this night, the light turned green and no one moved. This was because the first car in the lane was just sitting there, apparently trying to decide whether to turn right or go straight. I was about four cars back in the line of traffic and kept waiting for someone closer in to beep (it is an unwritten rule that if you are immediately behind said idiot driver, it is your responsibility to beep; the further back you are, the more confusing it becomes and the target of the beep can be questioned). In the end, the guy finally turned and I missed the light. I was less enraged by the missing of the light and more annoyed because no one ever beeped at the guy.
What else is a horn for if not for alerting other people that they are screwing up? In my experience, people don’t seem to care about being polite anymore, so what is holding them back from beeping and shaking their fist? Your horn is pretty much the only voice you have when in your car – sticking your head out the window and yelling is dangerous and generally doesn’t work, especially on the freeway.