I’m aware. Several issues there.

1. They use / buy lists of people to robo-dial
2. They don’t bother opt-out request handling on those lists reliably
3. The opt-out process is per-campaign, not party-wide, so the process is an endless cycle for all party candidates, and even the same ones running in future elections. Because we have no way to our out at the party level, the data is basically always there.

This is by no means am exhaustive list.