Twitter and why it's useless

I understand the need for people to receive their information as soon as possible, but some information is frivolous and unneccessary and people feel that they need to post it to the rest of the world. In my opinion social networking sites are useful, but I wouldn't classify Twitter in this category, in fact it's a big waste of time. People feel the need to just post what they are doing constantly on twitter! Why? the answer is beyond me. Updating your life can be done along with a million other things on facebook, so why the need for another Web site to do that in even more detail. It really doesn't add anything to the daily life, or make things easier - other networking sites do, they get people back in contact, help with communication and many other things. Twitter doesn't provide people with anything they don't already have - it even give people the ability to follow others and creep on them too.
Twitter often serves as a worse distraction than social networking sites, people are constantly updating things from the last time they used the bathroom to posting a picture of the hot girl the saw on the beach. Really? Is this the direction we're going in with technology, because it says a lot about us when we care about items that have nothing to do with our daily lives or that won't help us. It's not funny, it's not worth it and people don't need it because they already have something that does that, among other things.