There was a reason that in-person ballots historically have been required - it makes it less likely to harvest ballots (if not outright manufacture them).Yep, they found a loophole and will continue to exploit it. Alabama is the only state that requires the voter to return his/her own ballot.
Mail-in ballots should be allowed only for:
1) Those who have physical disabilities
2) Those over age 75
3) Those who live beyond 30 miles from a polling location
Beyond that:
1) No late-arriving ballots. All ballots are due by COB on Election Day.
2) All mail-in ballots should be counted first, to disallow the sudden “discovery” of ballots after it is determined how many they need to win
3) No month-long early balloting; rather, polls open for votes 3 days prior.