All very legal ... where I live
You are assuming that all countries have similar legislation to yours. They don't, therefore your views have limited geographical applicability. Besides, reporting my IP would have little consequence - it's 112.197.220.077 BTW - as VN laws aren't being broken. Neither am I a criminal. Furthermore, I and most others use VPN so IP's become even less relevant.
Most of our restaurant WiFi's are supplied by FPT (User: fpt; p/w: telecom) which are openly displayed when you access a WiFi (just hit enter) and the attitude here is that open WiFi is good for business. Only Western owned hotels think about charging for WiFi.
Same in regional airports, and even on the rail and some buses. Free and unlimited. And passworded.
So please don't get would up, privacy is being breached but I could careless about others traffic. My point still remains, if you have an expectation of privacy use WPA-PSK/WPA2-PSK, otherwise don't complain. Besides, what with all the smartphones sniffing your connections, things are really busy out there. And you don't even realise it.