Agree. I have some that are kinda rusty too, but I do pitch the really bad ones also. I saw on here somewhere that if you take the rings off after the jars have sealed that it will keep them from rusting.
I do usually remove my rings after I see a good seal. Funny story, I was talking canning with my Grandmother. She said that they never used anything over their jellies-- just some Parrafin and a sheet of newspaper plus a rubber band. Thanks for the advice on the rings, can't wait to see what everyone else says.