Wouldn't it be nice if the Mayor had full player rights for all four players? Granted there are those that actually have individual players for each character and for this a permission could be implemented during the initial interview for each character on the train.

I run the game for all four characters and so many times I have wished I could (as Mayor) enter another characters home and rearrange, add, remove items. I could eliminate having to shutdown and load the other character to perform these small "building" tasks.

I'm sure there are many ways this power can be abused however, if I am the only player for all four characters, who am I abusing?

Ooh, that would be so cool. I've got four characters, mainly for the storage space, and to be able to put up different themed houses as well. When I actively play, I swap characters around all the time, because "I need to be playing with them in order to do that."

It would be so convenient! Like you said though, it could be abused very easily.