To my mind, chainlines aren't sacred. (More so if you are running 1/8" chain and single cogs but still, a few mms make very little difference. On a geared setup, even more so. If fudging it a little to improve the chainlines you actually use and you can live with the extremes (either they are usable, just noisier, say or you just plain don't use them, go for it.
Now, this is my thought. I ride my bikes until they die. I have yet to sell a bike. I've recycled a few. So I am not concerned with what others think. It is just me riding it. And as I get older, I am starting to think of my knees as a bigger investment than my cogs (or even the paint on my chainstays).
Ben