We love the idea of being invisible, like throwing on Harry Potter’s invisibility cloak and walking by life unnoticed whenever we please. However, we do not think that stairs should be transparent in the slightest. They look more dangerous than anything else.
We would never recommend replicating this design idea unless, of course, you were planning to spite someone. Then, and only then, would we suggest using these underhanded methods to add a little ‘danger’ into their home?