Skype then admitted messages sent between two users were being copied to a third party, in "rare circumstances".
He admitted deleting messages from his Facebook page and sparred with prosecutor Joseph Cherniske over the meaning of the word "slay" in his messages about the girl.
The now-defunct tabloid's royal editor was jailed along with private investigator Glenn Mulcaire in 2007 after they admitted intercepting messages.
Shazib Khan admitted exchanging messages with friends saying they had a "role to play" and that he wanted to help "by any means", but insisted he meant through providing money and food, not violence.
In a statement, Mr McCartney admitted his messages had been "inappropriate" and said he regretted having made the comments.
Mackay admitted sending messages that were "disrespectful of other cultures" and the FA's investigation is ongoing.
In 2007, the private investigator Glenn Mulcaire and former News of the World reporter Clive Goodman were jailed after they admitted intercepting messages.
Since the incident, Pietersen admitted sending messages to his "close friends" in the Proteas dressing room but denied initial reports that he passed on information on how to get Strauss out.
It looked absolutely pro, although he admitted other messages were a bit harder to script.
It wasn't, he admits, a message readily embraced by pupils when he arrived.
