Need a pre-defined set of maps, AJAX autofill a bonus

For a personal site, this is awesome.

For a site using say, Events+ in a multi-site environment, it would be amazing to be able to pre-configure a set of maps.

That or... if someone puts in a custom address... hide the 37,296 other maps from them, at least prevent every tom, dick, and harry from adding their housewarming party's street address to the view along with the 907th version of a major nightclub on duplicate.

Is there a way to lock out the maps DB and sort pre-configured maps by, say, venue name?