I appreciate your main-idea of people watching more carefully for each other and getting together so that they can make progress on the path
That's not presumptuous at all.
However, what would the criteria be to determine who can be a tutor/teacher and who can't ?
How about shifting this idea slightly and making a forum for kalayana mitta (noble friends) pals ? That would mean that people could just put up a request for some friend who watches over them and then those could just start pm'ing or whatever they want. This would implicate that people don't get teachers, but pals who are on par with them. I'd prefer it this way because the status-quo is that we all can give advice on the forums here - but introducing a teacher-pupil system might discourage "pupils" from participating in discussions and threads.