Honestly? The word "douche" springs to mind. Regardless of the legality of it and how grey it may or may not be. I'm sure you thought you were doing something

Honestly? The word "douche" springs to mind. Regardless of the legality of it and how grey it may or may not be. I'm sure you thought you were doing something good. But, short of not using Facebook in a coffee shop, what do you expect people to do? Set up their own VPN? I bet that of the people you scared off, they'll all be back on in another day or two. Maybe at the same coffee shop. This is a problem that needs to be solved by on the website's end, not the user's end.