I've hiked the woods near where they found Cheryl. To my recollection, there isn't any internet access there, either, so I don't think he's missing out on anything.
As for who would write him - even the worst of the worst of offenders often have family who love them dearly.
Sure they have family that love them. I love my brother, even if he hasn't made the best choices. I just haven't heard anything about any of Hilton's family. I assumed he didn't have any family left.