20 might have made sense when the site was way more active. These days, I don't think people should be allowed to block more than 5 members at a time. The way things are set up, it seems like you can block an unlimited amount of people, but you really can't. It allows you to add as many people as you want to your ignore list, but once a certain amount is reached, any new person you block can still vote on your drops. I remember going through it with a few members when I was staff. People complaining that folks they have blocked are still able to vote on their shit. I would ask them how many people they have on their ignore list, and the only remedy would be for them to unblock some people so the new blocks can actually be effective.
They should lower the block limit and also create a log for staff to be able to see exactly who is on a user's ignore list. It would look similar to this one which shows the most blocked members (
https://www.letsbeef.com/haters.php)