Do i get this right? You published something on HubPages and now you complain that other people republish it? ಠ_ಠ
from the Terms of Use:
By posting Hub Content on the Service, You grant HubPages a ...
license ... to reproduce, publicly display, publicly perform,
distribute, modify, adapt and publish the Hub Content. ... By posting
Author Content on the Service, You grant HubPages a worldwide,
royalty-free, non-exclusive, perpetual, irrevocable license to
reproduce, publicly display, publicly perform, distribute, modify,
adapt and publish the Author Content on or in connection with the
Service...
I could imagine that a lot of automated spam tools scrape content form such article database to feed their own splogs, since the articles there are easy to scrape, nicely organized and get a lot of fresh content.
Captain Hindsight says: If you didn't want your articles getting scraped and republished by spambots, you should have never published it on any article website.