Did you bother to read the description of the double leg that I posted a link to?
Yes
Someone doing a double leg isn't going to charge at you from ten feet away.
*shrug* then don't do a technique that requires someone to start ten feet away. But the original post *was* about someone trying to charge and tackle you football style and about self-defense for TKD in general. It's all about situational awareness and choosing the right reaction. Not all defense work the same against all attack
If you are talking about a spinning side kick, though, in particular. I've done one with a person so close he was able to reach with my elbows. I did it because he was too close to me and I wanted to force him back.
Even if you did, what are the chances of you actually hitting them?
If they started charging from 10 feet away? Pretty freaking good. I practice that
Well, not really, but I do practice spinning sidekicks against a swinging heavy bag to perfect the timing against an incoming opponent (too soon and you miss...too late and yo don't get proper power at the point of impact).
Two people in arms reach? Interesting question...take two people; Person X has done 10000 spinning sidekicks in his life, person Y had done 10000 double leg takedowns. Now, if I am X, and I know Y is about to attempt that technique, will I do a spinning sidekick...probably not...I'm going to gain distance instead. If you are Y and you know X s about to do a spinning sidekick, are you going to drop and try to beat him...hopefully not. A good spinning sidekicks is very fast and powerful and crouching down to put your face into the line of fire is...not smart. Any other situation? Like anything else..who's fastest? Is Y's attack faster than X's defense?
One issue in your description is the need for a proper setup, and this is problematical for two reasons. One is that you have to be very close..and that means you have to get very close. In open combat against someone who uses kicking strikes as a first live of defense to keep someone from getting close....
The other is that the setup has to work. Most of the moves you describe as a setup move for distraction are moves that there are defenses against; many of which I practice already.
Not to say that they wouldn't work, but again...it comes down to who is better.
The reality though is that *most* people are not so skilled as to do a proper double leg takedown so that the trained TKD practioner (like our OP) versus an untrained guy trying to grab his legs without proper training; *any* technique has a much higher chance of success