I'd think German traffic engineers could come up with a better solution, yet these are everywhere:

The bike paths themselves are desire paths for cars and motorcycles.
To block them off, they put up barriers, but those also block cargo bikes, wheelchairs and strollers, create a collision hazard, and force all cyclists to stop and dismount for no reason.
Of course, they'll be bypassed wherever possible – naturally by cars and motorcycles too, if there's enough room.

Taken a few days ago in Oederan, Saxony, Germany

Stolen from Reddit. Original description:

There's a construction site opposite my apartment and the workers kept walking up the grass patch instead of using the stairs.

Boston Common

🤷

This desire path is official enough to be shovelled in case of snow, but not official enough to get paved.

Desire path for straight sidewalk

Don't really know why 2 paths were needed but alas. There is also one more to the left that is not visible.

… especially if the neighborhood is filled with little shits with too many electrified toys.

EDIT: Okay, I'm convinced. Regular bikes would actually be a sensible cause here. Let me be a curmudgeon though.

People walking between the bus stop (outside the picture) and the building (on the right) don’t like taking the long route around this huge green circle. It was pretty obvious that this would happen sooner or later.

Luckily people have found a shortcut