Basil said:
The bikers where I live certainly act like THEY own the road sometimes (not all of them, but too many). It isn't a matter of who "owns the road" it's a matter of using common sense if you're riding a bike.
Biking is very popular here, to the point that the local bikers were lobbying to completely <span style="font-style: italic">close</span> the only secondary road I can take to work and to town. It's a moderately used road by cars, trucks, motorcycles - and bikes.
I'm ok with sharing the road and all that, but a lot of the bikers here just ignore the rules and do what they feel like. The guts of the biking laws requires bikers to stay "...as close as practicable to the right-hand curb or edge of the roadway". They're allowed to ride two-wide, but "Persons riding two abreast shall not impede traffic when traveling at less than the normal speed of traffic..."
So what do a lot of (not all) the bikers do? They ride down the center of the road, sometimes literally on the yellow line. You'll see pairs riding together taking up an entire lane while a dozen cars and trucks are idling along behind them.
Then you have the biker groups that actively cause safety problems. Some of them flagrantly ignore the rules and ride 3-4 wide, making no effort to ride defensively. They peddle along and look back at the line of cars they're holding up and - I've actually seen this - <span style="font-style: italic">laugh</span>.
Other groups will ride single-file on their outings, but then it's not unusual for the last guy in line to watch for cars coming up behind them, then just as a car gets close he'll swerve way over to the left side of the lane. I think they're doing it to force cars to stay farther away from the "pack".
The first time that happened to me I panic-stopped because I thought the guy was going to wreck his bike or something. That's incredibly stupid and unsafe riding but I see it all the time.
For a long time I gave these guys the benefit of the doubt. One day I overheard a local guy talking on a ham radio repeater about biking. Turns out he's an avid biker...he was telling some friends about how he <span style="font-style: italic">always</span> stays as far to the <span style="font-style: italic">left</span> (near the yellow line) as he can so he can be seen better, and to force cars to go around him.
Bikes and cars have to coexist...and while the motorized vehicles also have to abide by laws about dealing with bikes, the fact remains that <span style="font-style: italic">not</span> riding defensively, riding with an attitude, ignoring the rules, and ignoring common sense sure don't help.