Does it save everything as in events and weapons and such too? If so I agree, someone could load a save of say a million 1x1 music bricks with emitters and crash a server. and also its lazy work, unless you want to show something off don't use it to build.
And wouldn't it also like, break DM's, and even CityRPGs? Whereas you can load something in a DM and a whole house in a CityRPG without paying for anything?