You obviously did not read the book or see the movie 'private parts'...by the time he got to WNBC, he was already pretty well known. He wasn't bashing his employers in Hartford or Detroit all the time like he was in NYC. By then, he was pulling in decent ratings, too.
Yes, I did. Both of them. I listened to his show from shortly after he joined W-NNNNNN-BC. Stern realized in Detroit that he should be himself. He started doing the act for which he became famous in Washington and - after repeated attempts to rein him in - got fired there. NBC hired him in New York, without realizing exactly what they had gotten (as the book and movie make clear). When an NBC TV did a news feature on Howard and his Washington show, NBC freaked but had already signed and begun to promote him in New York. The more they tried to control Howard, the more he trashed management on the air (including his PD, "Pig Virus"). Go back and re-read the book and pay attention this time.
again~ Stern did not start bashing his employers as a regular part of his 'schtick' until he was signed in the #1 market. He did not do it in Hartford ( at WCCC ) He also did not bash his Detroit employers at ( W4 ), either, even when they went 'country'. He only started that stuff as a regular part of his show from 1982-1985 when he worked in NYC at WNBC.
In the movie 'Private Parts' he starts his battle with his employer ( Paul Giamatti/Pig Vomit ) AFTER he signs with them. In the paperback version, he does not mention insulting his employers until pg 459 ( of 688 ), and again, it's him making fun of Pig Vomit at WNBC.
By this time, he already had great ratings and loads of pub. He really started taking his employers to task after he switched to WXRK after being fired for doing 'bestiality dial a date' on the before mentioned WNBC. Perhaprs you should exercise those reading skills,buddy

The point is, unless you are Stern, or a handful of other hosts, you cant get away with sticking it in the eye of your boss, and certainly no AAR host, not even Franken or Rhodes has enough clout to do that yet.