Actually, I can kind of understan the Fraggle Rock thing.
*dodges brick*
And some of the other mistakes, too.
*dodges more bricks*
But not the obvious ones (i.e. "Is Jim Henson still alive?").
Those I can't stand.
But if it's something like not knowing who Crazy Harry is, I can understand that. After all, not everyone's a Muppet expert.