Yes, aluminum foil does wonders for keeping cats away from things.
Yes, it does keep cats of things like kitchen counters but it also scares the f**k**g living daylights out of them at the same time 😎. Good idea? I think NOT because there are less scary ways of keeping your cat off certain areas if you are so inclined. Do you really want to terrify your cat even for a moment because you have a fad about your cat carrying diseases or something like that?
People don't know why tin foil scares domestic cats so much. It is the sound of it. It sounds like a snake in my view and cats are instinctively wary of snakes. Or the sound it makes when they walk on it massively triggers a warning in their brain that the stuff is dangerous. I let my cat jump up on the kitchen counter. It does not bother me in the slightest. I feed him on the counter while I eat breakfast.
Note: This is an embedded video from another website. Sometimes they are deleted at source or the video is turned into a link which would stop it working here. I have no control over this.
Are cats more prone to spreading disease than humans? I think not. In fact, a lot less as nearly all diseases are not zoonotic. What is there to be scared off when you allow your cat to jump onto the kitchen counter? I am more concerned about cats as there are hot objects up there such as hobs. Enough said. Don't use kitchen foil as a cat deterrent as there are better ways. That's my personal view. Please share yours.