It usually doesn't happen because those people don't vote in that state anymore, they're either dead or have moved away. This was investigated VERY heavily in Arizona since 2016. A MAGA voting commissioner went over every single voter on the rolls before and after the 2016 and 2020 election and did not find anyone on the rolls who had died or moved who had voted there. The complaint is that they are changing votes of people who voted, not adding votes of people who voted elsewhere.
It usually doesn't happen because those people don't vote in that state anymore, they're either dead or have moved away. This was investigated VERY heavily in Arizona since 2016. A MAGA voting commissioner went over every single voter on the rolls before and after the 2016 and 2020 election and did not find anyone on the rolls who had died or moved who had voted there. The complaint is that they are changing votes of people who voted, not adding votes of people who voted elsewhere.