Earlier quoted context omitted.
You're supposed to fix the frame to the stand, why are you just attaching the wheel? Wheel "grabbers" (usually just called 'fietsenrek') are pretty common in the Netherlands, especially the 2 level ones, because they allow the greatest number of bikes in a small area. This does have some downsides obviously, but in the Netherlands 'largest number of bikes' tends to outweigh other concerns.
> You're supposed to fix the frame to the stand, why are you just attaching the wheel? Because the "wheel grabber" makes it very hard to lock the frame as well as the wheel. About all that is possible without a long wire (which are generally easy to cut and thus inferior to a D-lock) is to get the lock through the rear triangle. This assumes you're able to get the bike in rear wheel first, of course. I'd rather find…
Is that a serious consideration? Jesus, I had no idea the environment in which these were used. I'd be scared to leave my house.