The wording on SOPA/PIPA is so vague that it pretty much allows anything to go.
Boxden would probably be one of the first sites taken down if this thing passes. We all know how much illegal stuff gets linked to this forum and there is no way to moderate EVERYTHING that each user posts and uploads.
Go sign a petition, tell somebody you know, call your congress representative, or at least like it on Facebook or some sh*t. No one is expecting anyone to go out and march but at least to spread the word.
Also look out for a new bill called OPEN that they're trying to pass as well. It's like SOPA/PIPA but not as bad and if edited actually could be useful.