Legal or moral issues that may change between countries / cultures set aside, that's why _i_ didn't help. IIRC I have consent of all AP operators (free City-wide, Hotel, Company, friend's WiFi APs) i have connected my devices to that use PSKs.

EDIT: now i know again why i configured my home AP to broadcast a separate WPA2-PSK protected guest network SSID providing Internet access only, and keep the private internal network's SSID private. This way, i can provide my friends with (permanent) Internet access, but they get no access to my "privates".