Are some episodes banned?

I've been told Disney bans episodes of its series' for all sorts of reasons, to the annoyance of cartoons fans. These three episodes never seem to appear on the schedule and I haven't found anyone who has seen them aired at all:

Episode #47 Super Hog-o And Don't Have the Vegas Idea
Episode #53 War Hogs And The Big No Sleep
Episode #78 Escape From Newark And Truth Be Told

Maybe it's just a coincidence that they're never shown but I suppose having 'War' in the title might be enough of a reason for Disney to ban that episode. And, err, maybe 'Vegas Idea' "supports gambling". I dunno.

If anyone's ever seen these episodes please let me know.