I've watched people put an impressive amount of effort into delicately navigating between those posts so that they can parallel park their car next to the curb. i.e., in the bike lane.
Drivers park in clearly signed bike lanes all the time, and when cyclists alert them to this fact they often respond with anger, not understanding or contrition. Common excuses are “I’ll just be a minute” or so on. It’s just part of how driving causes people to behave - I see the same thing with my apartment driveway which is regularly blocked by people parking illegally to go to the bank, rather than drive a few hundred feet and legally park in a garage.
Now, I’m sure there are some ignorant people out there, but the majority of people will just do what they can get away with regardless of what the law or the rule is. It’s like educating people to not text and drive. Just doesn’t work.
For example, I have plenty of run-ins with stepping out of a storefront and nearly getting creamed by a cyclist who's zooming down the sidewalk at 10mph, too. And it's frequently the cyclist who yells at me for failing to anticipate them barreling down the sidewalk illegally.
With a bike people wouldn’t just dump it on the sidewalk typically because they’d be worried about it being stolen (of course with the rentable scooters and dockless cycles, people do exactly that since they don’t have to worry about theft).
To my knowledge, the rules covering bicycles and pedestrians have never been on Illinois's written test, they aren't necessarily covered in driver's (or other) education, and, since most motorists (and also, I'm guessing, cyclists) come from more suburban environments where there just aren't as many bikes and pedestrians on the roads, people simply don't know how they're supposed to behave on the streets. Which is a recipe for unnecessary chaos.
Case in point: About ten years back, when she was visiting, I had to tell my mom not to drive in a bike lane. She was surprised to hear that it was a bike lane; she though it was just a weirdly small shared-use lane with slightly confusing paint marks.
And no, while I appreciate the good intentions of whoever it is at the DOT who thinks composes these things, cute rhyming phrases in glowing amber letters over the freeway aren't going to cut it.
However, the initiative needs a more robust implementation, with more consideration of driver behavior and parking needs. This is evident as many delivery trucks, Ubers etc. park in the lane (albeit, with emergency blinkers on, but it's a moot measure regardless) and push bicyclists into traffic. So while the bike lanes probably improve safety and reduce deaths overall, it can and does introduce a new, very real hazard: the necessity of bicyclists to suddenly merge into traffic. And this abuse is pretty rampant.
The hanging fruit is simply implementing stiffer penalities for such violations but this seems lacking. Coupling this with more temporary parking zones might be a solution. Then again, I'm not a civil engineer, just my observations and half-baked thoughts concerning the matter.