Why only them and not the whole Bitcointalk community?
The Bitcointalk community doesn't have a say in who gets banned anyway. theymos doesn't ask the community if he should ban user X or not. He either bans someone or he doesn't. User X will be told he got banned and the reason why. If he wants more information or proof, he can take it up with the forum admins who again make the final decisions whether user X will be unbanned or not.
Keep in mind that by revealing scam busting techniques you are also educating others who may not be interested in scam busting, but may use some of things when evaluating whether to invest their money into something/use some service etc. So if all those evidence and techniques are unavailable to an average forum user, we would miss some serious educational opportunity.
For example, during this bull run one friend told me about some "promising" altcoin project, asking whether I am interested. First thing I did was reverse image search as team looked dodgy, and of course team was fake. Now, if other more experienced scambusters didn't reveal some of those techniques I would think that team is legit, as Google didn't find anything. Only here I learned about Yandex being much better for that purpose, which is my first choice now.
I believe that you should share these techniques. If they are effective, then others can implement them and you will have exponential effects.
+1