Because I really think that people who engage in this sort of behavior SHOULD be banned from using the internet!
Seriously, this line of reasoning is flawed. First off, it's impossible given how easy it is to find a access point to the internet. Second, A person completely disconnected from the internet wouldn't even be able to keep up with society. Hell, a large chunk of jobs require a online application and many have been phasing out paper based ones. Third, such a ban on a person would likely go to court and be struck down. So overall, this isn't a logical approach but a overemotional one.