Considering this is terrorism and Dzhokhar Tsarnaev is connected by birth to a dangerous part of the world, he should have very little contact with anyone, except, his attorneys.

One has to consider where the impetus to this crime began. It began with Dzhokhar's brother while traveling to his home to visit with his family. He came back with a purpose other than living a productive and happy life. 

Dzhokhar carries with him a love for his brother enough to be influenced to carry out a heinous crime. I am confident there are others looking at his trial sentence and calling him a martyr. There are all sorts of heinous thoughts revolving around him. He needs to be a prisoner and not a martyr to issue instructions to the outside world.