I'm against SOPA as much as the next guy, but it's a moot issue. Browsers will just release new versions that use alternate DNS systems or get past any 'blocks'.
There's nothing uglier than an internet hate/protest mob.
To say it's a moot issue because there are technical work arounds is pretty naive. I seriously doubt any major browser would ship with a work around to this...I don't know why you assume they would.
Instead, these things tend to be two stage processes. In stage 1 the government attains new powers in order to further some generally positive goal. However, in stage 2 the lack of safeguards on that power leads to abuse and excess but by then it's already too late to easily roll back or block that power.
If we wait until the sky is falling then we will have waited too long. We need to ensure that personal liberties have strong protections, both offline and on. Failing to do so won't lead to immediate disaster but it will lead to making it nearly impossible to stop a disaster as it's happening.
A world without Youtube, Flickr, Etsy, and Vimeo. Plus the suppression of future innovative startups, all at the behest of dying media companies grasping for control.
If you think SOPA is a moot issue, you aren't paying attention.
I really can't stand this kind of stance.
Technical workarounds are NOT AN ANSWER to law/political problems.
At best, they are a kludge.
At worst, they get illegal, and some people end up in jail.
It's nice to have them, but only as a last refuge.
The number one priority is to have a sensible legal/political system, not to work around it.