github is meant for collaboration, designing it around adversarial use would be a loss for everyone. Adding a function to report absusive edits rather than an entire post would be a better choice imo.
hmm... isn't this more of a 'personal viewpoint'? why are you stating this like a fact?
moreover, how would it "adding Edited by ~" constitute as a "loss for everyone" ?
I agree on adding "report abuse" button, but if no one notices that edit, how would anyone know what to report in the first place?
Normally, repository maintainers are not self-sabotaging like this.