On Wi-Fi Security

I've always left my own Wi-Fi access point unsecured, while traditionally advising most people to secure theirs. Why? Because I didn't want to be responsible for theirs if it proved a problem, BUT, felt that if I blocked P2P (Peer 2 Peer) networking, which I do (in theory) on the router, there was no real risk. I'm now reading about router owners being investigated and found partly responsible for all manner of bad behavior. Sadly that means - it's lockdown time. As of today, I'm now running WPA mode security.

Granted, not many people will be out because of that. But how many local coffeeshops, hostels, similar places are going to be getting a lot more hesitant to offer free Wi-Fi if the courts continue to pursue investigations and even penalties against unsecured hotspot owners? Granted, for now, it appears in *most* countries that places of public accommodation are recognized as such and not being pursued. But, how long until the courts say "keep detailed records" (a task not worth it for a small business) or we're going after you? Of course, this won't affect big restaurant and hotel chains that can pay an ISP with tracking abilities and all that to run their WiFi, potentially taking an amenity traditionally associated with small businesses and making it exclusive to the big guys... :(