If it is ok with the moderators, I may be able to PM you the article with comment from a former FBI agent.
I don't know how you'd lock/open the car with foil around it. I must be missing something here. I don't have one of those cars yet. A few bad people can really make life difficult for the rest of us. Perhaps the car companies would make a cover the the keys that easily slided to to the side when you need to use it...I'm thinking those metal tins that were popular. Right now I have a key pad on my car's door that opens it so I don't need a fob.
I do not know the combo for my car. I would be lost with out a key. Some cars come with a fancy leather covers and those cars I think are the targets. The key cover does not protect against thieves, still it looks too hard for me to think about.
I agree Penny. Don't know how foil around the fob would work. Actually emails about this very thing have been circulating since 2008 according to Snopes. Their rating is a mixture of True/False:https://www.snopes.com/fact-check...
My theory is that if it was a real risk your car would come with some sort of protection to prevent it.