Most of the heavy drinkers at the time were punted from the club. Ultimately when Keane started running his mouth, he was punted too. Rooney was on the verge of being sold as well had Moyes not saved him. When Beckham started to get out of line and covet fame, he was sold to Madrid. Of course Fergie dealt with drama but more often than not, it was a one time thing. The exception being Ronaldos courting of Real - but at the time he was the world's best player - not turning in piss poor performances week in, week out.
My problem with Pogba stems from his agent. If Pogba wasn't actively trying to drum up noise, wouldn't he either instruct Raiola to button it or find another agent? The nonsense before the derby last year, his comments after the opening game this year, coupled with his overall average/poor performances makes me think we should get rid if we get a decent offer - which you're right, we will. Also, he's clearly trying to undermine Mourinho's authority which, regardless of your thoughts on him, is unacceptable
My point was that I'm fairly sure if Fergie was manager, he'd probably offload him. Based on his performances for us, he's hardly worth the hassle.