Ultimately, the blacklist feature is pretty much worthless. Squeenix needs to prioritise fixing this, with all the below (and possibly more, if I forgot anything).

- It should blacklist the player's entire account, not just the particular character you happened to run into.
- It should render that player's character(s) invisible to you, as well as render your characters invisible to them.
- It should automatically remove them from any of your social lists (friends, FC, etc), and remove you from theirs.
- It should remove them from the pool of players that the Duty Finder can match you with, and you from their pool.
- It should automatically hide their Party Finder listings, and hide yours from them.
- It should prevent them from being added to any party you happen to be in, and vice versa.

There's probably more things I haven't thought of, but this covers the absolute most basics at least.