Why bicker? There is a seed of a good idea in this post.

I think # of shared files method can definitely be improved upon. Putting in a reward for sharing desirable files and lots of them would be a good idea. Remember that the majority of freeloaders are just ignorant, not malicious.

What we need is some very simple way of communicating that you will get better performance by sharing more in-demand files. Some people are really out to freeload and cheat the system, and they will probably always find a way, but I think most people wouldn't mind sharing files if they knew how important it was.