is yoga dangerous? is it safe for people with scoliosis?

It is important to be cautious when practicing yoga, there was a piece in the New York Times a couple of years ago written by a yoga tutor who was explaining how within the yoga world there is almost a conspiracy around hiding the dangers and risks associated with yoga. I have been thinking about trying yoga again but  because of the injuries I have acquired with physiotherapy I want to make sure, as for as is possible that it is safe. There are a number of yoga postures that may be harmful for people with scoliosis. These include; forward bends-be careful with this posture making sure that you do bend your knees. Avoid the Cobra and the Locust position.   Be careful with twisting your torso, bending sideways and doing the shoulder stand. The warrior poses or the half lotus can be dodgy for your knees. I have just dug out a DVD by somebody called Elise Browning Miller that is specifically about Yoga for scoliosis so I’m going to give this a go. Elise Browning has scoliosis herself.