We have bike lanes and they are somewhat useful. It's not a complete network, they're not the best kind and city seldom bothers to remove debris from them. Every winter, they plow the streets and pile the snow (and debris) right in the bike lanes.
The best bike lanes I've seen are in NYC. Instead of having parked cars on the curb and a bike lane on the outside of that (in the traffic), they have lanes with the bike lane between the parked cars and the curb. These protected lanes are awesome. There's a lot less friction between drivers and cyclists, debris doesn't pile up in them and even grandmas feel safe to toodle around the city on a bike. Unlike most places, where it's either pedestrians-on-wheels (POWs) who bike because they don't have other choices or recreational spandex cyclists on bikes that cost more than my car.
If you don't ride a bike, you might not understand why a cyclist would ride so far to the left in the bike lane. 90% of the time, it's to avoid the broken glass, rocks and other nasty things which have accumulated in the bike lane. Also, if there are cars parked on the side, it's not safe for a cyclist to ride in the "door zone" right next to the parked cars.
There's definitely a lot of misunderstanding of the bike rules, especially among car drivers who don't realize the law in most places allows a cyclist to ride pretty much anywhere cars can go and that a cyclist has the right to take the whole lane when safety demands it. And yes, a lot of cyclists completely blow off the rules.
The rules need to be updated. In a couple of states, you don't have to come to a complete stop at stop signs, and you don't have to wait for a red light. You do have to slow down and make sure it's clear before going through a stop sign and you do have to come to a complete stop at a red light. Except in places with VERY heavy traffic, this makes A LOT more sense than having to stop/start at every intersection. I think these laws should be almost everywhere.
I used to commute by bike and loved it. I got a workout every day without having to go to the gym and it didn't take me any longer to get to work than if I drove. Parking was easy, I wasn't pumping a bunch of co2 into the air and just being outdoors for an hour a day was often the best part of the whole day. It would be nice if more people could have that and not have to worry about getting run over.