Nonsense. I've been driving for 35 years, and I've seen a car on the sidewalk exactly once, and that was a wreck. Cars are highly predictable for *most* actions. If you see a car driving the wrong way on a one-way street, they're lost. If you see one driving the wrong way on the wrong side of the road, they're insane.

Pedestrians are all over the place, but they are slow-moving.

Bikes are wherever they want to be, whenever they want to be there - as a rule, as a standard, as what I have to anticipate unless proven otherwise. You can go on about how other vehicles break rules too, but the reality of my experience with bicyclists is that they consume an absolutely disproportionate amount of my traffic awareness when on the roads, and that's why I hate them. When I talk to other drivers, they say more or less the same thing in other words. And that's what the vast majority of bicyclists report as feedback from motorists, so it isn't just me.

It's complete denial to just say "motorists hate us because we're (free/slow/healthful/whatever)". They hate us because we (as a collective) don't follow any set rules of operation.

KeS