Number of prisoners caught with active Facebook accounts almost doubles in a year: Criminals use social media to 'taunt victims and attempt to intimidate witnesses', charity warns | Mail Online

Number of prisoners caught with active Facebook accounts almost doubles in a year: Criminals use social media to 'taunt victims and attempt to intimidate witnesses', charity warns | 

The Scottish political activist, Tommy Sheriden, carried on writing his blog,daily,from inside Barlinnie prison using the library computer. He was advised that continuing to do so may affect his early release date. Note advised not punished.
Why are prisoners allowed access to the Internet???