[Alex3917]

For what type of squats, and what does bad for your knees mean? Risk of acute injury? Risk of longterm damage? Are we talking half squats or full squats? Sets of 6 reps with heavy weight, or sets of 100 reps with light weight? With feet flat on the floor, or on an incline (with heels slightly higher than feet)? Does the damage occur at any weight, or at some threshold? What about jumpies?

Saying squats are bad for your knees doesn't really mean anything, and I doubt your orthos would actually know offhand. If you have a question, go look up the relevant studies from the academic literature, and then ask if you don't understand something.