While we have our own troubles up here in the frozen North, our elections seem to have fewer problems for several reasons, some of them being:
All races use paper ballots.
NO results in a time zone are released until ALL the polls in that time zone are closed.
A minimum of two poll workers supervise the ballot boxes at all times.
Districts (ridings) are delineated by an impartial panel after census.
Releasing the results based on time zone is not a good idea. Some states cross more than one time zone and the results should not be released until all polls in that state are closed.