I've got an Apple II+ that was doing weird shit. Turns out after a lot of sleuthing that it was a single bad DRAM chip, which due to the way that system handles RAM would show up as single unpredictable bits in various locations.
NASA, seek me out if y'all get stuck.
This doesn't apply to parking entrances or other areas where cars are expected to cross the sidewalk, which is the specific portion of that point.
And the bigger point in my view is pedestrians. I don't believe that pedestrians should need to deal with bikers on the sidewalk. It's called a sidewalk for a reason. Walk the bike.
I understand bikers being upset about unsafe road conditions, but lessening safety of sidewalks for pedestrians is not the answer.