I don't really get the problem. While they have their priorities, Facebook IS important for many people, and might very well be in the future, so making sure to

I don't really get the problem. While they have their priorities, Facebook IS important for many people, and might very well be in the future, so making sure to register the right usernames etc. in case is the right thing to do. Just like it's the right thing to do to register domain names if you start a company, regardless of whether you have an immediate intention of launching a website.