I wouldn't call Ultrapeers freeloaders. They are the backbone of the network.

I sometimes connect as an UltraPeer when I have bandwidth to spare but remove all my shared files when I don't want 31 KB/s more to be used. (This is the lowest upload setting for a T1)

I don't have unlimited connection and do this when running other Bandwidth consuming Apps

BTW I do normally share and when doing this I almost never download anything (1 or 2 songs at the most)

Does this in any way make me a freeloader.

I too hate Freeloaders (Leeches) and would like them gone from the network and do wish that the Slider would work, but still I don't consider an UltraPeer a freeloader unless He/She is doing some heavy downloading as well. I use torrents as well and strive to keep above the 1/1 ratio (preferably more) and when using Limewire I think I give lots more back to the network than I take from it.