Rupert Murdoch hits out at 'enemies, old toffs and right wingers' His comments on the social networking website were made in response to the claims of corporate hacking as News Corp attempted to take over another TV network in Australia. Foxtel, part-owned by News Corp, is currently in the process of acquiring the rival network Austar in a $2 billion bid. Mr Murdoch said on Twitter: "Let's have it on! Choice, freedom of thought and markets, individual personal responsibility. The mogul, who has been on Twitter since New Year's Eve, has used the website to voice his opinions on a range of political and media issues. Earlier this week, he criticised the Prime Minister following an expose in the Sunday Times that revealed the Conservative party co-treasurer Peter Cruddas was offering access to David Cameron for "premier league" donors. He said: "Of course there must be a full independent inquiry on both sides. The latest claims against Mr Murdoch's company suggest NDS, a technology company that was part-owned by News Corp, had a secret unit which encouraged the widespread hacking of competitors. The practice reportedly cost rivals $AUS50m (£33m) a year and helped put at least one out of business.