Tom Watson, a Labour MP and key adversary of the Rupert Murdoch-owned paper during the Commons inquiry into phone hacking, tweeted: "Tomorrow's sun headline is "Boy, 4 has mark of the devil". Do you ever get embarrassed @rupertmurdoch? Please sort it out." Other Twitter users expressed outrage. Some speculated the mark had been caused by a hairdryer burn. Sagor A M Dewhurst@scode83 wrote "The front page of The Sun has a story about a 4 year old boy supposedly having the mark of Satan. This is a mainstream newspaper people," while @sonofspeke tweeted: "The Sun soars away into the 17th century "Boy has Satan's Mark". User @angledweb said : "The Sun is literally demonising a child on its front page. Surely that's abuse."A spokesman for the Sun said the story was provided by the parents, who had already publicised the pictures and story on Facebook. "We sought to treat it in a lighthearted fashion, highlighting the ap...