binahyeseira-
It sounds like a great idea but I have some reservations.
Most important- I don’t think it’s fair to put anyone on the list without their explicit permission. Given the skewed advantage towards shidduchim that guys have I doubt many would want to sign up.
Also, before many people give their permission they’ll want to know who is going to have access the list and in what way it’s going to be used.
Which gets back to my original idea of having a board in charge of certifying shadchanim and a universal set of rules that all shadchanim must follow or face losing their certification and possibly facing consequences.
(By the way, I realize that in reality this is probably never going to happen.)