A very interesting Goonwaffe post popped up today on the Eve-O forums. CCP will have to give any sort of reward system a very good thought before the bring it to the live server, since people will be manipulating the system, as you can read in this post.
Giving points according to the value of the ship and cargohold of the victim is not the smartest idea. It is clever of Goonwaffe to figure out the most efficient way to manipulate the system by filling up barges and keep killing them again and again.
Anyway, read it yourself at the Eve-O forum. The thread is already 13 pages long when I type this.
Update: The offenders will get a slap on the wrist for exploiting the exploit before reporting it according to massively.