Usually I'm not done editing so all they're doing is creating unnecessary revisions that I just clobber anyway. I don't care if I put "it's" when I meant to put "its". Leave it alone, at least until I'm done.
Does anyone else have this problem?
I suggest that when someone creates a post they have a 5 minute window where no-one else can edit it. The same thing would happen when you edit a post. I believe a lot of clobbering occurs during this window.