Messing with my body that way just scares me. The human body was made to have a regular monthly cycle, and to stop it completely can't be good in the long run. Of course, I don't like putting a lot of chemicals and weird things into my system in general, so I guess I'm strange that way.
I wouldn't feel comfortable doing something like that personally, but I can see how people with medical conditions could benefit, especially if they are anemic.