Drugs are a nuisance. True free speech/money something else entirely. But even more important: It is generally far easier to track packets electronically than to track physical stuff.
Small potatoes stuff like memo now? Who cares. But "main stream" social platform? Then Joe Sixpack has to be able harden his home computer setup (weak endpoint) to resist NSA
Not to mention willing to endure the hazzle it means, instead of just using FB for his cat movies. Also, it is not enough that NSA cannot break into his rig, they must not know there
is something hidden there. Cause if they do, they can come to his house and take him down. If it is seriously illegal, that would mean prison for poor mr Sixpack.