Mod un-editable to supporters/co-authors?

[Paul M]

However good or desirable this may be, it's unlikely to ever happen. Modifications are threads in a forum - and the whole way that forums work is that they are only editable by the thread/post owner (or by moderators). Changing this basic fact would mean a fair amount of work messing with a number of files and permissions, which is not something to be taken lightly - the potential for breaking something, or opening permission holes, outweighs the small potential gain (very, very few mods have real co-authors).