Voting rights for owners
The blog Sneaking Suspicions has an interesting post about Dewey Beach, Delaware. Dewey Beach allows property owners to vote as well as residents. The town's mayor was concerned that time share owners would be able to vote and that the number of "owners" would overwhelm the residents at election time. (Thanks to Sam Heldman for the link to Sneaking Suspicions.)
I mentioned the flip side of this question here in a case involving residents of New York City and resort towns in New York State.