His "crime"? Using the word 'Medicare' on his community-run Save Medicare website.

With government lawyers breathing down Mark's neck, he needs a huge wave of people power to swoop in behind him – so that he can stand strong against the government's legal threats.

Sign the petition calling on the Turnbull Government to stop bullying Mark Rogers.

Check out Mark's 'Save Medicare' website

Here's what Mark told Fairfax media on Thursday: "I've committed a terrible crime, I don't agree with a government policy." You can check out the 'offending' website (which he's been working on since 2014) here: http://www.savemedicare.org