Good post asur. Sheila Kitzinger writes really well on the subject of choosing not to have scans. She helped me state my case in her book Pregnancy and Childbirth.
Fruitful, as for placenta praevia and the like, there are signs from the body (bleeding for example) if these issues arise. I would certainly welcome a scan if I did show such signs. It's the routine use of scanning I objected to and I know of so many women who had miserable and stressful pregnancies, needlessly, because they were told there may be some sort of problem.
In all of these cases everything turned out to be OK after all. What a shame these women were denied the right to enjoy their healthy pregnancies.
I realise that there can be problems, but the body tends to give signs for these and for me scanning is just another way of medicalising birth, taking it away from women and frankly, looking for problems. Medical professionals have a habit of viewing pregnancy as an illness and pregnant women as patients to be healed or interferred with in some way.
I'm sure there are many women who enjoy this sort of support and monitoring of their pregnancies, btu those who don't, like me, are treated as freaks who aren't to be trusted. I felt forced to fork out for indie mws each time because of the medical establishment's inability to support my pregnancies and births in the way I wanted.