Reactive is what you make of it... "Adarq.org - Dedicated to athletic performance enhancement," ATHLETIC being the key word. No "athletic" positon consists of your ass being lower than your knees, or your knees past your toes. Yes you're right, free squats do strengthen your legs. BUT the risks FAR outweigh the benefits. I'd rather have my knees intact long enough to enjoy the benefits of squatting.
When's the last time you saw a BodyBuilder run the 40? They can't because their joints are destroyed from free squats. (Maybe some roids too.)
This site doesn't know the difference between a Hang Clean and a Power Clean.
You're either a troll or like - very stupid. I mean that sincerely. I wouldn't lie to you.
So, first you take a sentence that talks about reactivity and then YOU talk about ass to grass squats. What's the connection of that with reactivity? You can be reactive regardless of squat depth. So you either don't know what the word reactive means, or you're just... crazy.
Then you say above parallel squats are safer for the knees than full squats. I'll let others address that.
Bodybuilders have joints destroyed from full squats? It's intersting since the bodybuilders are the ones who usually quarter squat most of the time. And roids destroy joints? I was under the impression that they are prescribed after joint surgeries sometimes to help heal joint damage.
A hang clean is a "full" clean from the hang. A power clean is a clean with a high catch that is generally more specific to athletics since the goal is not to move a great weight on a short rom (as in a regular clean) but to move a "decent" weight over a longer ROM (for athletic benefits).
There are lots of clean and snatch variations: hang clean, hang power clean, power clean, clean, clean and jerk, jerk, powerjerk (well not really, but that could be reserved to you).
PS. Watch any great dunker and you'll see the knees going in front of their toes. Is that "100% healthy"? I don't know, especially at those velocities/power. Probably not. But that's not the same as a squat with good form. There are different limb lengths for different people, so deal with it.