> What is there on /r/Golang that they expect to see edited?
This is an insane question to ask. This is as flawed as arguing for mass surveillance because you have nothing to hide now.
The questions should instead be "can we trust our comments to not be edited when management disagrees?". What if future management starts loving python so much they decide to do something malicious to other programming languages? It wouldn't be hard to really hurt Go with the eyes of 25,000 Gophers subscribed.
All sites have this ability but few successful ones have demonstrated a willingness to use it. I fully expect that if Twitter or Facebook were caught doing this we would see an enormous backlash and huge drop in stock price. Then shortly after stockholders would demand the CEO leave.
EDIT - If you must downvote, please comment so we can discuss.