Structure title and model acquirement

My pier setup stabilizes a bit. I was able to reproduce a few page layouts of our project and integrated some components. At the moment I really love it as most of the things I wanted worked out today. One thing that I want to change is the title of a structure. I don't want to have it as not all pages have titles and the others deal differently with something like a title. So why is the title mandatory for a structure? Is there an easy way to get rid of it? Navigating to a page, pressing edit and just integrate a component by doing +...+ is really great! But I'm asking myself what is the best way to acquire the data the component needs. As an example I have a user and the user has a list of images. I have a component that takes a list of images and displays them. In my current approach these are connected via Announcements. Whenever the user changes the image list component gets his model set to the new list of images. What is the best way to decorate a component with some functionality? thanks in advance, Norbert