I've seen a couple of rivals/allies bases which have been expanded strangely.
ie. one guys looked like (_ being expanded and x being unexpanded)
xxxxxxxxxxxxxx
xxx____xxxxxx
xxx_xx_xxxxxx
xxx_xx_xxxxxx
xxx____xxxxxx
xxx____xxxxxx
xxxxxxxxxxxxx
as well as other people going off on crazy paths and things.
Is there any point to this? Just sseems to me it makes defensive structures less effective.