How to block bittorent upload completely?

I'm running Vuze torrent client on Linux Mint and I am looking for a way to block upload completely. *** I am willing to change Vuze for something else if Vuze is not capable of achieving this goal. *** Vuze is only able to limit the upload to 5 Kbps, which is not 0! Another thing I would like to have, as I upload large amounts of legal Linux ISO torrents, is a way to easily switch between Enable upload and Disable upload mode. I can't seem to find any suitable plugin for Vuze. Something of this sort exists. It is named Auto Stopper. But it stops the upload after a certain ratio, it cannot be adjusted under 1.0. *** Rationale: I contribute to the network by uploading Linux ISOs. But movie uploads are prohibited in my country. And I won't risk prosecution. So: - I cannot upload movies (but can download them legally). - I contribute in other ways (uploading many Linux ISOs). *** Is there a way to achieve my goal? *** Update - I am aware the network needs seeders for the torrent network to function. This question is dated 2015. Many things changed, including the way I function in networking and systems. - I don't use Vuze anymore. It's too heavy, among other things. - I switched to self-compiled Transmission . - I use a PIA VPN on my machine with port forwarding and split-tunneling.