Wireless local area networks (WLANs) have enjoyed a rapid increase in usage in recent years. WLANs serve to connect users to the Internet by means of radio or infrared frequencies. The rise in WLAN usage has however served to highlight some of the inadequacies of the present laws governing unauthorised access to WLANs. At present, the legislation serves to make unauthorised access, modification or impairment of electronic communications illegal. It is clear that the provisions prohibit the hacking of computer systems and denial of service attacks. However, it is unclear whether the legislation extends to additional forms of unauthorised access such as wardriving (using software to identify and map freely available WLAN) and joyriding (accessing a network with no further damage to the connection). The liability of Internet Service Providers and those engaged in unauthorised access in public places also remains unclear. Finally, the relationship of the offence of unauthorised access to the tort of trespass and the laws of copyright remain untested. The objective of this paper is to consider the measures necessary to increase the effectiveness of WLAN laws. The paper will begin by considering the nature of WLAN technology and the policy discourse to date. This will be followed by an examination of the present Australian law and an identification of areas of uncertainty. Finally, the paper will consider the measures required to enhance the certainty and effectiveness of the laws governing unauthorised access to WLAN.