I don't reuse foil because I don't use it very often. I pretty much only use it for meat.
My grandparents lived through the Depression. My grandmother washes plastic silverware and Ziplock bags and will reuse them, no matter what they've been in contact with. She also will run her dishwasher on the rinse cycle only, with a little soap thrown in, to save money on water and electricity. I'm scared somebody is going to get sick at her house someday.
When I was growing up, my dad insisted we use only 4 sheets of toilet paper per bathroom visit. I absolutely ignored this, especially after I started menstruating.
As someone else said, life is too short and hospitals are too expensive.