Know that you have complete control over what you put in your mouth. No one ever ate anything by accident.
If it doesn't swim, run, or fly, or isn't green and grow in the ground, don't eat it.
Strength is gained in the range it is trained.
You can't fire a cannon, from a canoe!
Not only are squats not bad for the knees, every legitimate research study on this subject has shown that squats improve knee stability and therefore help reduce the risk of injuries.