Considering the gay population in California I find this to be a very poor choice on their behalf. People do what they want regardless of laws, so even if they don't have the right to be married they will still continue to live together, and sleep together, and be together, throughout the rest of their lives. So why bother them? They just want to put it on paper, and feel like they are accepted into society that way.
Think about this, there are still many racist people out there, angry that Asian, Hispanic, and African American's get to vote. The KKK is always going to be around, even if it has to be undercover. Besides, it's not like gay people don't have all the rights we do. They do get all the rights everyone does, except they can't get married. So many people get divorced nowadays it's hard to say that straight marriage is any stronger of a union.
I believe it's time we all got off our high horses, and let people be. If gay people want to get married, let them. It's a document. A piece of paper. Not the end of the world, because everyone is going to be gay because of it.