What are the health consequences of ingesting rust?

What are the health consequences of ingesting rust?

            Here's one post on the subject:

                        Rust is Iron Oxide. Hence, any warnings concerning the ingestion of iron may apply. Ingesting too much iron, whether it be via rust, supplements, or otherwise, can lead to unpleasant symptoms including nausea and vomiting. Long-term side effects such as liver damage can be associated with excessive iron intake. In extreme cases, iron overdose can be potentially fatal, particularly in young children. Iron overdose is said to be the leading cause of 'accidental poisoning leading to death' in children under six. Iron, as a mineral, is a dietary requirement for our bodies. We need iron to aid in the manufacturing of red blood cells. Anemia is the lack of iron, or ability to absorb it. In general, under 30mg of iron a day may be considered safe or normal for an adult as a supplement, but you should always consult with a physician before supplementing your diet.

                         Just as you might expect with any dietary requirement, moderation is the key. When in doubt, give your doc a shout.

                        Here's  a wiki link on the same subject:  http://en.wikipedia.org/wiki/Rust