I don't even know how to answer that.....
I share files... all of them.. some people are jerks I guess...
... I figure... since someone was cool enough to let me download... I'll share what I got...

Besides.. limewire doesn't have enough staff to mod the whole network..
.. and if people did it... they'd ban everyone.... screw even more people...

One good Idea would be... for people to forcibly share their downloaded files...
For that... the entire software would have to be reconfigured...