roverthis,
Firstly, welcome, as I see this is your first post. It has been a while since I looked at this thread, so just found your comment about my argument. But I will continue to maintain the view that 10^0, !0^3, !0^6, etc are sufficient divisions, at least for my type of engineering work.
I agree with you that kg/m^2 is inappropriate. The standard pressure units for structural engineering work should be kPa and MPa.