There is a chasm between what "normal"/non-tech people might consider proof of mens rea (and probably explains some of the history of the laws) and what technical people would consider proof. Technical people do stuff like MAC spoofing all the time, as in the article.

I run Tor because I can always reach my SSH server as a hidden service, even through firewalls. I strip my HTTP headers with an HTTP proxy because I don't like having to constantly configure all my browsers to throw out adnet cookies. I set curl and wget to spoof a more common user agent, because some things simply don't work otherwise. This sort of remedial stuff literally scares non-tech people, and having to constantly explain and justify such network magic to anyone who doesn't know how technology and networks work just to make them feel better is tantamount to bending over for a TSA screening because you're brown (OK, not quite that bad). It's increasingly demoralizing, and doesn't feel like freedom in a supposedly free country (Canada). I have nothing to hide; I'm still not willing to bend over like that. No one should. It's the new McCarthyism. Lawmakers and non-techs are afraid of us, and so we're treated differently, and it's becoming scarier (just because SOPA was stopped in one country doesn't mean there won't be more). I don't want to work to help people who fear my knowledge rather than celebrate it and, while I hardly think "web apps" represent anything like the future of the Internet, I'm a little afraid to work on much else if I intended to release it. (The person who made bitcoin didn't want his identity on it.) We're already paying the price.