Okay, all of the changes done to the Blacklist so far are great, but one massive oversight that needs attention is this which I post below, I have tested this with an Alt account:

You make a friend and add this new friend to your Friends List.

However, this friend later turns into a psychotic crazy person, and you decide it is best to now remove this crazy person from your Friends List.

Crazy person friend is removed from your Friends List at the click of a button, joy.

Hang on, what is this! Crazy person friend just teleported to my <--redacted--> house!!!

Okay, no problem, I seem to be still on Crazy persons Friends List (confirmed this is the case, you are NOT removed from a "De-friended, friends, Friends List"), I'll just add Crazy person to the Blacklist.

BAMMMMMMM, where did crazy person go? totally invisible and can't see crazy persons messages anymore, nice.

But wait...

It's not over....

Crazy person STILL has me on their Friends List! What! WHY!
They can see my name, my online status, my location, my FC, and they can teleport to my estate!!!

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Problem:

Removed friends keep you on their Friends List.
Blacklisted friends keep you on their list as a friend and can see your status and teleport to your house.

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Solution:

In both cases, the de-friended friend and the Blacklisted friend, need to have you automatically REMOVED from their Friends List.

You don't need to tell them with a system message, just remove the de-friended friend and/or Blacklisted friend.

I thought that after the update, adding someone previously on your Friends List to the Blacklist, would you know, automatically remove you from their list so they can't keep tabs on what you're doing.