OP is incorrect, eating flakes is perfectly safe. The whole point of Teflon is that the bonds are so strong that it will not react chemically with anything else, including your insides. Scratching it up is just you damaging your stuff, not a safety risk.
The safety problem with Teflon is when it is overheated. Don't heat a pan without anything in them, because then the Teflon will decompose into some really toxic chemicals. Good news is that water boils at 100C, an even the highest smoke-point oils decompose at 250C. Teflon only begins to deteriorate at 260C, and only full-on decomposes at 350C.
If you do happen to scratch the pan, surely the resulting flake is very likely to go into the food, and you’re then very likely to eat it?