They also go on to say...
Tweets may be searchable by search engines and are immediately delivered via SMS and our APIs to a wide range of users and services, with one example being the United States Library of Congress, which archives Tweets for historical purposes.
When you share information or content like photos, videos, and links via the Services, you should think carefully about what you are making public.*
I do however see that those links you posted are no linger good, so you may have already managed to get them down, Congrats!