Prime Minister Scott Morrison has sparked a furore over free speech by vowing to draft new laws to ban protesters from boycotting companies, prompting claims his "feverish" talk would curb the rights of all Australians.

NSW Council for Civil Liberties president Nicholas Cowdery said Mr Morrison's plan was "totally contrary" to the right to freedom of expression and that existing laws could deal with unruly conduct or assault.

"Large issues such as climate change and protection of the environment encourage strong responses by citizens whose broader rights are affected," Mr Cowdery said. "Protest action may well increase if effective measures are not taken by commercial interests to address those issues. Citizens should not be criminalised for taking such action.

"The Prime Minister says that they will take their time to get it right. No matter how long they take, they cannot get right wanton infringement of the rights of Australians."

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