Sounds like a great idea! And I hope not to see someone using this as an opportunity to request as many bass tabs as they can.
Depends on how people format their contributions.
Are we expecting text (example: "the song starts on the root, but you can play an arpeggio by adding the 3 and the 5....)?
Or are we expecting some form of charting (example: "I play 1-3-5 then 1-6-2.....)?
Or are we expecting video with a verbal description of what we are doing?
Or are expecting some combinations of all the above?
Writing out a tab would take MUCH longer than any of the above, so even if somebody asked for tab, they'd probably get "re-directed" in a hurry.