See the spiffy black bars to the left and the right of this text? This website modification is to protest the potential passage of Legislation that would give a minority (the entrenched recording/film industry) vast powers over the content of the Internet. This type of legislation threatens the economic incubator that is the Internet while protect a tiny part of our economy that needs to modify itself to remain relevant in modern times.
Should lobbyist protecting the horse, carriage and buggy industry been allowed to persuade the Federal Government to outlaw cars because they potentially used the same roads, copied their main innovations (wheels! suspension!) and caused an industry undue harm?
I trust you can answer that question and align the analogy yourself.
An article on how you can take action:
http://arstechnica.com/tech-policy/news/2012/01/protesting-sopa-what-you-can-do.ars
–Nat