I'm sure this will affect more than just free Wi-Fi access points. A lot of places such as airports, supermarkets and unsupervised Internet cafÃ©s have coin-operated Internet terminals. While these generally prohibit running or installing of unauthorised software, some do allow downloading, especially those that have USB ports or SD card slots. At present, unless one pays by credit/debit card, most machines don't collect any personal info if the user just pops in a coin.
For pay public Wi-Fi points however, it would mean that one would need to provide ID to buy an access voucher, so buying a Wi-Fi access voucher would not be as quick as buying a can of soda.