Visit that website and contact your local representative and tell him/her what the website tells you to say or if you are well-educated in the area then tell them how you feel.
Seriously, this is a violation of our constitutional freedom of speech, it violates everything this country stands for, that is why it passed in comunist china a few years ago.
I'm British and I blacked my tumblr for you guys! I use American sites more than British, really, but... This thing is stupid. Overly-protective much!? Your congress should take a leaf out of the UKs book (although I bet they'd hate to because at the moment, our government is weak thanks to a coalition) and just leave the internet alone.