Q: When I delete a person from my friends list, I want my character to disappear from theirs, as well!

Yoshida: That would lead to the problem of “Why did he delete me?” and might cause trouble, so we didn’t do that on purpose.
Honestly I'd take the "Why did you delete me" awkwardness over a former friend still retaining access to our every location and the potential for harassment, depending on how the friendship ended.