> What business does the state have in that? The main reason these sorts of rules seem to exist is as an attempt to prevent gang leaders who are in prison from

> What business does the state have in that? The main reason these sorts of rules seem to exist is as an attempt to prevent gang leaders who are in prison from continuing to effectively run their gang. Now in practice this ends up requiring a fairly draconian crackdown on communications that may well not solve the problem of running gangs anyway. But this is the "why", in a nutshell.