The reason is, they usually are under some condition of supervised release calling for restriction and/or monitoring of what they do on the computer.
This is invisible censorship; these people truly are the voiceless because they aren’t given any right to publicly dissent. They might as well grab a gun and shoot up the government, but I guess they figure they have too much to live for outside of prison.
If I were to become a registered sex offender, I wonder what I would do? One thing’s for sure — this is yet another unorganized constituency. They aren’t even really represented by NARSOL, since that group has gotten taken over by femoids and cucks.