I don't know where I really sit on this topic. On the one hand I understand the desire to have perhaps a bit more moderation. It does help. My first wall I uploaded was rejected. I was bummed at first, but was able to go back, look at it and see where I could have done better. My next two were accepted, so I think the process helped some.
At the same time I can see how moderating every single library can be difficult and too onerous a task. Also, I have seen folks who uploaded something that was not great, took the comments they received, and did better work. Sadly there are some individuals who don't do that, but it would be a shame to punish greenies like myself and prevent us from getting valuable feedback because of a few trolls.
Meh, I am rambling.