The reason nothing will stick to the other side of fridge magnets is generally because they are ****ty magnets.
If you get something magnetic, and hold it up next to the magnet, then the magnet won't work through it though.
Btw, this may all be bull****, I'm dredging rather deep here.
Also why does someone think the rebound would be bad, surely it wouldn't be much difference from a coil fork.