Cyclists ARE a menace, to themselves.
I recently saw a cyclist come from the sidewalk on my right, cross an intersection diagonally across me (between two left-turning lanes of north/south traffic), get back up onto the sidewalk, and then later get into the bike lane going the wrong way, at an alarming speed.
As a motorist and a cyclist, I was completely stunned. It's cyclists like that why motorists hate cyclists.
Nobody can avoid killing you if you don't even pretend to follow the rules of traffic. But many many drivers forget that they are required by law to not run over cyclists, even if they are inconvenient.
I have seen more cyclists do ridiculous things than I could count. I give them a wide berth, but, I have to admit, some of them seem like they're trying to get killed.
Likewise, a lot of drivers more or less don't give a damn and will practically run them over, or off the road, or door them. Sometimes buses don't even obey bike lanes.
I won't ride a bicycle on city streets anymore.