No, not at all! This is because Wireless LAN designed for the standards 802.11a,b,g,n & s use a part of the radio spectrum which is free to be used by anyone, provided the radiated power is controlled.
Called the “Public Park Concept” it is relatively unregulated by the Australian Communications & Media Authority (ACMA) who allow all users the same rights regardless of who they are - business, telecommunications carriers, government departments or private citizens.
Beware of any misleading information to the contrary as there are some cowboy businesses who might try to have their customers and the public believe that they have special rights when it comes to the use of this radio spectrum and that other users create interference and are unauthorised or even illegally using it.
Such claims are not only deliberately misleading but should be treated with caution, as licensed carriers and ISPs are legally required to make every reasonable effort to ensure service continuity to their customers.
A reputable ISP would only offer wireless connectivity in such unregulated environments as either a hotspot solution (eg 50 metre radius) or last mile service in remote rural areas. Where the back-haul service is supported by landlines (i.e. fibre) or commercially licensed radio links to ensure service quality and continuity.
ACMA Reference: What risks are there in operating in a 'public park'?