We actually already have to cope with this since we already crowd-source taxiway layouts. My view is: we’ll put infrastructure in place when the problem occurs; there are a lot of of ways to cope with collisions of contribution, and the problem has been solved in many cases already.
So I want to wait and see what kind of collisions occur and then pick the best method (whether technological or organizational) to deal with them. Robin already tracks who submitted data, so we have the basis to identify when there has been a change or a possible collision. (Source X-Plane Developer, Ben Supnik)