If you go on facebook and post shit under your real name, and with global setting that anyone can see you can't complain when it comes back to bite you in the ass. My file with the authorities is minimal.

What about the people who post a bunch of fucked up shit and everyone asked after they go postal why no one saw the signs. Maybe some of these people can be detected beforehand.

I don't see this effecting my life in anyway. The man needs to go to a judge to find out my twitter identity. If i post something under my real name on FB it's my own fault. If i post something saying I am suicidal maybe i should get a knock.

People posting threatening and extremist views should be watched, we watch the muslims extremists might as well watch the white ones too. There is not enough money to watch all these people though, it will not be an effective database. All police and governments in canada are incompetent and I see no reason this will be run right or work. Nor do i fear it.