I have not been harassed for riding in a bike lane. I have been harassed for riding on narrow roads without shoulders and on residential streets (can you believe it?). Seems to me that when there is a designated space for cyclists people are happy to drive in your presence. When there isn't, they are less so.

I think it's a leap to say that the latter is a side-effect of facilities or whatever. That the facilities create the anger when you aren't in them. In places with no facilities anywhere they get angry with cyclists. And nobody ever yells, "get in the bike lane." They yell, "get on the sidewalk" or "you're supposed to stay to the right." Knowing that facilities exist somewhere in the universe doesn't seem to make any difference in the willingness or happiness to share the road with you when they are nowhere near your current location.

I think the anger is simply based on the speed differential. People just don't like to slow down or be inconvenienced. So, since the speed differential will never change, does enduring harassment HAVE to be part of vehicular cycling? Or can anything change about this? What on earth will it actually take to change this?

Personally, some harassment is enough to make me want to quit cycling. I'm pretty tough, so I'm sure that there are lots of people out there who do just quit.