No no you're right. I expect many complaints go on daily & nothing gets done about it. It's time they did something. Some poor bloke was dragged under a lorry a few year back here.
It's like any sort of inequality... it'll be a struggle, but it is achievable. Just like it isn't acceptable to only serve white people at a restaurant, or to point and laugh at the disabled in the street. For both of those groups, I think the discrimination was mostly down to ignorance.
It's obviously not an identical situation - we do choose to be cyclists, after all - but there are some parallels that we can draw, and I'd hope it could be a similar sort of deal for cyclists. Letting people know how dangerous this sort of thing is and the consequences it could have if it goes wrong might give people a better sense of empathy for cyclists, so that they don't drive like idiots around them.
There will always be some bad apples - perhaps the car's equivalent of UKIP members or EDL supporters - but I'd like to believe that we can at least get the majority on our side. If more people cycle - and judging from the stats, they will - more people will understand cyclists, and those in cars will be more likely to have cyclist friends, too, which I'd hope would make them more considerate of cyclists.