This is not aimed at one poster in particular but addresses a pattern I have noticed in FWR and it may well happen elsewhere on the site.
The ability to name change is sometimes abused by particularly goady posters who once they have exhausted everybody's goodwill by their goadiness, name change in order to trick people into interacting with them again, on the same subjects.
To me this is an abuse of name changing, which must actually be intended to help posters maintain their anonymity so different threads cannot be matched together and posters outed.
It's also against the spirit of making parents lives easier, and can make some topics and sections of the site virtually unusable for some users because very prolific, goady posters cannot be ignored.
I suggest MNHQ introduce a new talk guideline around abusing the name change feature. You must be able to "look behind the scenes" and if verify this when people report it.