rules lawyer question

  Cloaking devices mass "1 per 10 mass of ship".  Does anyone here
think that should mean they mass 0 for ships of mass 9 or less?  I
didn't think so.  I didn't bother arguing the point with my
campaignmates - I just silently deleted a PDAF and amended the cost
appropriately, but I think the idea of a mass 2 cloaked scout with a C
battery and a PDAF is really neat.  I'm just wondering whether there's
a general consensus on this or any similar rules which can result in
zero masses or costs in degenerate cases.

-joachim