It comes after Starbucks Coffee rolled out an international block in this year, following consumer pressure.
Family First commissioned the poll by Curia Market Research that found 79 per cent of respondents thought there should be adult filters in place for public Wi-Fi, with 16 per cent opposed and six per cent unsure.
Bob McCoskrie of Family First said the result was “indicative of the growing community concern over this issue”.
Family First supporters went around some cafes and fast food restaurants testing if they could access pornography on the Wi-Fi, finding some blocked pornography, and some did not.
Some members of the public told 1 NEWS watching pornography in public had never occurred to them, another said they had “never heard of it, and that it seemed “a little unnecessary” and one person agreed people should not be watching pornography in public.
Netsafe said there was a range of tools available that businesses can use to block content.