Yeah, just to be polite if for no other reason I have my torrents set to run--no matter what--until they're a little over 1. It's nice that you can tell Azureus to stop a torrent automatically when you've reached a set share ratio, so you can most efficiently use your outgoing bandwidth.
In my case, since my upstream is nearly 10X sower than my down, if it's a healthy torrent I can easily finish a download and only have like a .2 or .3 share ratio, and it sometimes takes quite a while to make up the difference. It's only fair to wait it out, though.