I am repeating something I was told and I am sure some-one here knows more on the subject than I do so can refute or verify this.
"Companies like youtube and cafepress have software which is set to automatically flag images likely to have come from a third party source, cartoon, TV show or include a celebrity face which would therefore infringe copyright law. This then initiates a warning."
It is to cover their own backs.
Youtube claimed WTBTS had contacted them regarding the video clips I had up but the notification I received from Cafepress is not accredited to them and not all the images have been removed. They have allowed the one with the blue sunburst background of Sparlock.