No doubt there is a growing and passionate coalition of anti-CISPA goers all over the internet. CISPA, most basically, gives private companies the ability to share customer information with the government for security purposes without facing repercussions for violating their customers' privacy rights.
Recently #CISPA has been trending on and off of twitter and the topic is staying near the top of Reddit. The activity in opposition to the bill far surpasses those in support. But whether you are for or against CISPA, there is nothing in the bill that an internet user can "violate," or that would put direct "censorship" on anything you tweet, like, pin, or whatever else you do on the internet.
CISPA is an internet security bill. It gives private companies immunity for sharing information gathered from its internet customers/users. Nothing imposes fines, let's the government censor, or otherwise changes personal use of the internet. Period.
While many opponents seem to have it right, even self-proclaimed "constitutional experts" and others leading the charge for "internet freedom" tweet about "violating CISPA" or being "censored by CISPA." These fear-laden statements are not accurate.
For the record, taken as a whole, I tend to be against CISPA as written because of the potential for misuse by both companies and the government due to vagueness and over-breadth.
Here is the text of HR 3523, "CISPA"