It used to be easy to falsify that information, but no more. Most private trackers would easily ban you for that nowadays, unless you can get all the other clients to also cheat with you using the same parameters. It's easy to cross-reference the information coming from N clients, so you'll be booted relatively quickly.
That sounds like a useful development to counter such abuse, but i don't think this feature helps your torrent client wherever it should upload data to any given peer.
