There are plenty of ways to celebrate Banned Books Week. I personally like to sit in very visible public place in my Intellectual Freedom Fighter t-shirt and a copy of "The Anarchist Cookbook," but you may have a more subtle way to show your disdain of censorship.
There is plenty you can do, libraries and bookstores all over the country host Banned Books Week events. You can watch YouTube videos of your favorite authors reading from Banned Books as well as other promotional videos.
If you're more the social networking type, you can follow Banned Books Week news and events on Facebook, Twitter, and Flickr.
You can check out the ALA's Ideas & Resources page to create your own Banned Books Week event or you can see what other organizations are doing to support Intellectual Freedom. There are plenty of ways to get involved and show your support.
My favorite thing on the BBW website is the map of challenges to book in libraries and schools. The map only shows the reported incidents; the ALA estimates 70-80% of challenges go unreported.
Don't be complacent about censorship. It is never acceptable in a free society for someone else to tell you what you can and cannot read the same as it is unacceptable for someone to tell you what you can and cannot think.
"Where they have burned books, they will end in burning human beings." -Heinrich Heine
Top 10 Challenged Books in 2010