I agree with that, they still have some issues with sharing on links, videos and other media related things as well but it's still in beta so it's understandable hopefully it starts changing to suit more open uses like you said.
I heard there is going to be an upgrade rolling out next week but still nothing about cataloging +1's or photo censorship. We shall wait and see. In the mean time I'm going to write a letter suggesting content filters before it becomes an issue.
That's a very good idea I might construct a letter as well, the more people send constructive letters, perhaps the more they will mold the site for the better.
GREETINGS !