Algorithm opt-out plan faces major political hurdles

Critics say the federal government's proposed reforms to tackle online harm are not tough enough. (Lukas Coch/AAP PHOTOS)

A social media crackdown that would force tech giants to offer an algorithm opt-out faces major hurdles after a key minor party dismissed proposed penalties as "bugger all".

An exposure draft of a much-anticipated "digital duty of care" is expected to be released in the coming sitting fortnight as Labor steps up efforts to tackle online harm.