I heard the Instagram hype all over internets and tried the software, but deleted it right away when I saw it required an account. I can see why they are doing

I heard the Instagram hype all over internets and tried the software, but deleted it right away when I saw it required an account. I can see why they are doing this, but from my perspective it's just greedy. No need to integrate everything, I just want to take some pictures not register to a service. Soon we will have calculator apps that force you to make super-calc-account where you can share your calculations with your friends...