Really...? No, REALLY..???

[David Jamieson]

I won't say it's deadly but some technique such as to "crash your opponent's knee joint side way" is not proper to be used in the sport environment.

Too illegal for sport.

This will be the new catch phrase soon.

Boxing? WTF? I thought I came here to stab you in the face with this dagger!
Too illegal for sport.™

[MightyB]

I've decided I'm too deadly for the ring, or too much of a sissy - I sometimes get confused.

[David Jamieson]

I've decided I'm too deadly for the ring, or too much of a sissy - I sometimes get confused.

Start wearing a tutu whilst sparring. You'll get past that.

[MightyB]

Start wearing a tutu whilst sparring. You'll get past that.

But that only invites people to attack with the Russian Monkey Grip.

[SoCo KungFu]

I won't say it's deadly but some technique such as to "crash your opponent's knee joint side way" is not proper to be used in the sport environment.

This isn't the issue he's bringing up though. Yes, some techniques are not proper, when viewed in accordance with a set of safety prerequisites, for sport. This is true for heel hooks, this is true for calf slicers, etc. But, just because 1 of many techniques is not suitable, doesn't mean the art is unsuitable. You are not saying the art is unsuitable. There's plenty of other stuff that would be perfectly acceptable, you've even posted clips here many times illustrating techs from SC you think would be good for MMA.