I believe the poster was referring to ballots that were mailed out to the last known address of voters whether they were requested or not, GG! That was the practice in some Democratically controlled States in the last election and it's something that practically BEGS for someone to commit voter fraud!How is this not secure.
I requested a mail-in ballot using personal information that only me or a ID thief would have. That ballot was mailed to my address on file with my voter registration. Once it came I filled it out and signed the envelope and sent it back. The ballot had an ID number known only to me and I could track it from post office to election office to processing to being counted. If the signature did not match they contacted you via Email you supplied when you requested your ballot and you had till election day to prove it was you.