The recent case of Cricket Australia sacking their public policy and government relations manager, Angela Williamson, for criticising the Tasmanian government's policies on abortion and the environment has raised questions about free speech and the workplace.

Before this case Israel Folau's tweeting controversial comments saw calls for Rugby Australia to act, and Roseanne Barr was recently sacked by her ABC sitcom for her derogatory comments about a US political advisor.

Now a case involving an Immigration Department employee, who was sacked after anonymously tweeting our criticisms of her department, is headed to the High Court.