I think he embarrassed the Academy badly. F9/11 didn't get a single Nomination and that was certainly one of the reasons. As for embarrasing Academy moments how about Vanessa Redgrave's 1978 speech about 'Zionist Hoodlums'. One of the great moments came right after that...writer and outspoken Israel supporter Paddy Chaefsky said "I would like to assure Miss Redgrave that her winning an Oscar is not a pivotal event in world history and a simple 'Thank You' would have sufficed."
..... just after Moore made a fool out of himself and the screen industry, Steve Martin come on and stated "the IRS is now helping Michael Moore into the trunk of his car." (lol) That was a classic.