We have experienced numerous problems with juno.com accounts, and have had limited success in having juno's administrators help us solve these problems. Because of this, we are unable to prevent abusive Juno users from returning to lists after they have been removed. The only way to prevent this is to disable the posting ability for all Juno.com users.
When we are convinced that Juno will police its problem users, we will enable the postings from Juno.com users again.