Here's my two cents (now worthless due to inflation):
I think blacklists, in effect, are to be reserved for trolls only - anyone who intentionally tries to ruin the experience of others by cheating or bending the rules to their whim against the wishes of the majority involved.
Any other type of voiding or ignorance of other people or groups who are trying to have honest roleplay means you have established yourself as private - where you have the right to deny anyone you wish because you want to run a very specific and driven plot. However being private also means your events are set apart from the public timeline.
Imo public roleplay, and to be counted as such, must accept anyone as long as they demonstrate no intent to sabotage or otherwise troll the roleplay.
"The gods envy us. They envy us because we're mortal, because any moment may be our last. Everything is more beautiful because we're doomed. You will never be lovelier than you are now. We will never be here again." - Achilles, Troy
01-Dec-2018 18:19:03