I completely back Warrick up on this - at no point did Steve put Kermit anywhere near Ozzy aside from in the press cordon later where Ozzy willingly posed with Kermit for a set piece organsied photo with the press. You have to remember two things :-
1) Sharon was nowhere near the stage as the VIP area was right at the back. She would be dependant on whatever Ozzy tells her and he isn't even coherent 99.5% of the time, plus they needed a story for a TV show.
2) Ozzy has a 'stage persona' and is expected to have some kind of controversy around him and what you even see in his documentary is very exagerated. In real life he's a fairly normal English guy and would know, especially around the Queen and a lot of other people he would respect in the buisness not to act up.