Most Controversial Sesame Street Moments of All Time

Granted, it was out of necessity since the actor who played Mr Hooper really did die.

Should be first

I don't see the problem with everyone now knowing of his existence instead of writing him off as Big Bird's imaginary friend, and that only because you can only have everyone *just* miss him so many times before it gets old. But plenty of people are still miffed about this development to this day.

So controversial it's a "lost episode" that never made it to air. Though later an unnamed Muppet bird and Abby Cadabby were shown to have divorced parents.