This game...

[LianaThorne]

The blacklist literally prevents interaction with that person. It does what it intends to do. If you do not want to share a screen with them, leave.
Do they HAVE to magically disappear from your screen? No. Like I previously said and is ignored, they have as much right to stand or wander in any open area as you.

As someone who had a person blacklisted and they still managed to follow me around the game while I was doing MSQ, spam me with slap emotes and even go so far as to take on the appearance and name of my original character (after I changed both to try to throw them off) and proceed to harass my friends....the blacklist only prevents messages being exchanged. It absolutely doesn't prevent stalking/harassment/interaction taking place in other forms.

Yeah, person can stand there but it's pretty common courtesy to not just send a random person a creepy message because you're speeding on a red bull and trying to use a disorder as an excuse for the behavior. Speaking as someone who has one, it's not acceptable.