I have not deleted any post either and would not unless the information contained therein was a life safety issue or it was someone who was outright slandering someone else.
As a moderator on other sites I will usually contact the person making a questionable post through a private message to inform them there are treading on thin ice. I will give them a chance to correct their mistake their self but if they don’t then I will take the appropriate action.
As to code issues I am always looking to discuss in a respectful manner any issues that come into question.
One is Arc-Fault devices and how they would relate to today’s installation.
Another would be metal water pipe bonding as has already been discussed here.