Soviet Heavy said:
Lets make a list of the most Satanic children's shows that have ever been aired.
I'll start with my two picks.
The Grim Adventures of Billy and Mandy.
Peewee's Playhouse.
got any others?
Hmmm, well to be honest I don't think there has ever been what I'd consider to be a Satanic children's show. By hard core Christian definition pretty much everything is Satanic because if something doesn't come directly from god, it has to come from the devil because there are only two forces in the universe. What's more the requirement to go to heaven is to accept god and his teachings. The Devil doesn't need to be malevolent, all he has to do is turn you away from god, and this can be done through benevolent and good will as much as anything.
The hardest of the hard core Christians withdraw from society (Quakers, Amish, etc...) based largely on this. A lot of it comes down to controlling variables to things they know do not come from Satan, a simple life becomes a protective measure.
That said, unless your getting into Satanism through omission, most children's shows seem to stay away from anything that I consider evil or corrupting, and standards for this stuff are pretty high. What seems creepy to adults is the simplicity of the fare given that adults rapidly become jaded and feels anything so pure seeming has to be a trap of sorts.
That said I think the "Candle Cove" thing took off because there have been so many obscure children's shows over the years, especially in the 70s and 80s when they were experimenting, that they can be hard to keep track of, especially given that some literally only saw a few episodes aired.
Truthfully though I somehow missed "Noseybonk" (does not look familiar and I grew up in the 1980s) but still, it does occur to me that the mask would work great for a cheezeball horror movie.