So now, the terrorists and child molesters still use the bar, but they always go into the bathroom to talk. The owner suspects that they are talking about bad things in there, and installs surveillance cameras so that if the police ever need to know what's happening in there, they have access. Would you want a real life bar owner to record you on the toilet just so that one day the police can track some bad guys easily? Probably not. Do you think it's reasonable to expect privacy on the toilet even when you're in a bar owned by someone else? Yes, even if it might one day make law enforcement a little harder. And just like we think that people have a reasonable expectation of privacy when using places intended for that in the real world, we think they should also have it online.