I'm sure we could each think of some benefit or another it provides, but I daresay their is consensus that certain aspects of it are unfortunate. IMO a risk/gain ratio assessment makes it rather clear that the auto-blocker does far more harm than good.
As far as "unamanageable", in theory everything is managable, but the results I have seen havn't been managed well at all. I think we'd be far better off w/o a system requiring so much attention in order to get it right.
Jack (Sam Spade)