My son's mountain bike has QR skewers, but also has these ridiculous looking snap clasps that hold the front wheel onto the fork, and would probably work even if the skewers were removed.

The funny thing is that I almost always forget to snap those back on. They aren't needed, but we will be riding along and I will see them dangling. Then I have him stop so I can snap them in.

It seems pretty ridiculous to me, but I am not a corporate attorney. I do know when I was a kid I would take a wrench to every nut and bolt on my bicycle and I had no clue what I was doing. I can only imagine what close calls I created for myself.