Leeching implies the unfair stealing of resources, 1kb does not imply resources.
In the above situation you have forogtten the critical thing. There is a limit to the number of people who can download off you at any one time in most P2P programs. I've never used emule but odds are there's one there too, use it. I've never really worried about this since Shareza comes preset with decent limits (7/3).