The instant I read the link, the very first thing that came into my mind was The Thought Police from 1984 - but Gulliver beat me to it at 10:30 this morning.
Of course, Orwell was painting a nightmare vision of the future, and despite the advent of 'social media', we still have not entered the realms of the totalitarian state in the West.
The whole notion is utterly ludicrous!
How on earth can you prove in a court of law that someone 'knew' someone else was going to do something?
The court proceedings would be very short - something along the lines of -
Prosecuting QC - "Did you know that Mr X was going to blow up his local supermarket?"
Defendant - "No I did not know that.
Defence QC - "M'Lud, since my learned friend is completely unable to gainsay my client's statement, or provide any evidence to dispute his response, I suggest that M'Lud dismisses the case, and we can all have an early lunch."
His Honour - "I am minded to agree - case dismissed."
So, to answer Khandro - no it does not appear to make sense, and no I do not agree.