If it's was an optional gamerule and you could edit the amount of frames/damage taken to the head before passing out then i'm totally up for this

Problem is we already have DM's, fracs and most of the time people complain about how random they can be. imagine how random this would be, playing pretty well then all of a sudden *relaxed*. In some cases it's hard enough to get someone's back facing you let alone where you have the opportunity to grab their neck. they will probably tell what you're doing then just counter. it just seems like a lot of work for something that might get used once or twice a day/week, for that reason i just cant support the choke hold. however the knockout seems like a really good idea, +1

Like I said it's optional and could be used in an entirely new official mod Like cb_martial_arts_spar_cagev2.tbm but with ABD gamerules
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It could be called MMA.tbm

Still, it requires a lot of code for something nobody would probably use. If it's optional I can only see it happening in custom matches/ non-official ones and will mainly happen in sparring. even then, they could just relax all themselves if it's sparring. still a no from me

The thing is there are so many shitty ideas and people just whine about how they should be optional. Nobody wants to open the game rules menu and sort through so many shitty ideas no one uses just to check one box that is actually useful.
You said that it would be fun to defend against a choke hold, but Toribash's grab is impossible to break. Choke holds would create a new "technique" that guarantees a win every time. It's really not that hard to grab someone's head, so choke holds would completely ruin the game.
Not supported. Make a script, bro.

FINALLY something smart, Zenboy I like you but seems eveyone else disagrees. Cmon guys you are missing the chance at new techniques, A WHOLE NEW LEVEL to toribash, but you all think its fine. Also with the neck grab thing, why cant you just use a technique to break the other person's hand off? quite simple if you ask me. Anyways closing, guess you guys dont want to make this game more fun.