You assume a lot of things, most of them wrong.I assume the same particular individuals wouldn't do it cause it would imply a failure in their watching of the vote. And no, I'd feel safer with them there cause they're out in the open and not hiding in the bushes or planting bombs in pizza places or something. Their watch can keep them occupied and away from other sorts of mischief.
No, they're going to contest every election they lose because it's about power, even if they have a bunch of self-appointed poll watchers trying to intimidate people into only voting a certain way. The claims of voter fraud are made in bad faith. What have they done that makes you think otherwise?
And I don't believe for a nanosecond that keeping them "occupied" with fake authority is going to do anything other than show them yet another thing they can get away with doing. When are you going to stop coddling these reprobates?