Not yet, that might take a while as you already heard people in this thread: Scorps wants to have one custom thread for each CSC, other people want to have the same for their regular training threads etc. Some guidelines will have to be made, which is Vincent's job. It's best to do them both once rather than adding first prefixes and have people just mess around with them.
...you're not supposed to train in the NW. That's one major issue, I can still understand if a custom skill was trained there, however canon training always has been and should be done in the TG and not in the NW. Such trainings are not even legit and wrong as no sensei has access to all the villages and NW main forum by default is not meant for training.
You're also contradicting yourself. If your students add themselves 'Doton' and then change their training midway, what difference is there then when they do it with prefixes? None. So even in the worst case, it's impossible to become even worse than it is right now. When people are forced to use prefixes (which can be done physically as in the OP, FT etc. sections), they might be less inclined to change midway their trainings, even more so if a rule is added that they can't train anything else than that specific skill. Also it's not only them that have to find those threads, but also all the mods, sensei and pretty much any member if he or she has doubts about a certain person having learned something.
I will add the link to my reading list, like the Quick Access thread...approved CE thread...
Kiyoshi clan hideout...Kage summit...
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It's still coming...oh my, that sounds porno-ish >.>