@Cableguy, I like this idea. However I don't think that it will work with these settings. Eventually someone will mistakenly (or not) move the placemarks and will save it.
I'm not too familiar with GMaps, so I don't know how to prevent that...
However, from what I understand, a prompt will show asking to wither save it or not, so an accidently saving will not be so easy... Still.. on purpose... it's another ball game.