Erland is looking for support on the ability to be able to insert, update and delete rows in a view when there is an instead of trigger on the view.
http://lab.msdn.microsoft.com/ProductFeedback/viewFeedback.aspx?FeedbackId=ab8e717d-8087-4337-9c27-1b4aa12a47f5
I think this is a usability issue and I find it out that MS say they won't fix it. Bottom line is anything is possible and this is just not nice behaviour in a user friendly product.