There are inexpensive solutions (<$100 US per year) that will provide the wifi hotspot management software that links to (remote) authentication servers that will provide the shop keeper with control features such as content filtering, bandwidth throttling/control, user time and transfer limits, firewall configuration, reports, etc. Unfortunately, many small shop owners simply do not feel there is any need for them to pay any money for a wifi user-management system. They'd much rather do it the "cheap 'n' easy" way by simply opening up access on a $45 wifi-router from WalMart, which of course opens up the potential of abuse by customers or by anyone within range of their wifi signal.