This is the sad reality of being a cyclist: we are the neglected middle child. In the eyes of the law, we are vehicles. In the eyes of motor vehicles, we are an annoyance that slows them down. So, the motor establishment builds separated bikeways for us and tries to use the law to force us to use them. Then pedestrians find these bikeways convenient and pleasant, and make them so dangerous for cyclists as to be essentially unusable. Then they post to HN (or whatever) and complain about all the bikes using the bikeways and how dangerous this is for their pleasant afternoon walk.
Personally, I don't believe in advocating for bikeways for this reason. Bikes will never get to use them, and if they cross traffic at all, they are death traps (because drivers don't look for objects moving as fast as bicycles on the sidewalk when they are turning). The only exception is the lakefront trail because it has a total of 12 street crossings in 20 miles (4 of them in the last mile of the north side, two that have essentially no traffic, and two in the last mile on the south side). This property makes it safe to use. All it needs is a really nice running path and sidewalk closer to the lake (so that pedestrians won't even want to use it), and finally you have a bicycle expressway, one of the few places anything in Chicago can go 10 miles in 30 minutes. This will never happen, though, because it will cost money and because the recreational cyclists will force the pedestrians off the pedestrian-only part onto the bike-only part. Sigh.
I think the best general solution is what Chicago does: a lot of streets have a picture of a bicycle painted onto the right traffic lane and signs that say "shared lane, yield to bicycles". This lets cars know that bikes are doing the right thing. Then you just need bicycle driver education (I like "Effective Cycling") so that the cyclists stay safe and don't impede the flow of traffic. Unfortunately, I've found that getting on a bicycle seems to mean turning off your brain and doing whatever feels right, which is often wrong.
(And that's why I don't like bike lanes, because they make doing the wrong thing feel like "the law". "There's that stripe, so I must make my left turn from the curb, that line on the road says so." Then they die and everyone whines about how dangerous cycling is.)