Radio silence must be one of the 'rules' that a lot of sparkies paid attention to! I see the same results as what Greg said above. Personally, I have no issue with radios.
As to 'nastygrams', I have written a few recently, and yes, a lot of people get a 'copy'; but...it gets results a heck of a lot quicker than a 'sweet' memo/letter. Recent 'issues' have been to another new crop of solar (resi) installers who lack basic 'clues'. (This has to go into the Permit rant thread).