Yeah, you're totally wrong... you really shouldn't go giving incorrect advice if you don't know what you're talking about.
Having the BOV just after the turbo(s) is not a problem at all, in fact this is how the 1JZ/2JZ are set up from the factory. If your BOV isn't venting you might have the vac line hooked up to the wrong place - it needs to connect to the plenum, or somewhere after the throttle body. Where do you have it connected now?
Oh, and a plumb-back BOV vents to the inlet system pre-turbo. It has nothing to do with the exhaust whatsoever.