Times were much different, back then. Though 'gray areas' were in abundance, human rights was not one of them.
Much of Family Guy's satire comes from certain boundaries people have, over the years, placed on society. Now Family Guy tramples all of these boundaries, thus hurting the feelings of people who believe these boundaries need to be honored, while still leaving with a positive closing message.
Now compare Family Guy to Woodstock, of a previous era. A lot of people's feelings were hurt, because they did not approve of the boundaries being pushed, BUT Woodstock ended with a mixed message. Woodstock actually destroyed the lives of many. (Peace, law breaking, and drug addiction...)
Kings Island, with last year's publicity stunt, brought back very unpleasant memories to the families and friends of Steve McNair and Heath Ledger. In my honest opinion, this is far worse than any trampled boundary.