I once had 'myself' on my friend list. he sent me and several other people very rude and inappropriate messages, to which I then had to apologise for. I later found out that this can be done through creating a japanese account with the same usertag.
Like I say, I can't confirm this with evidence, but that's what happened! Furthermore, a couple other people knew about this, so i guess they're my witnesses? lol.
anyway… Glad you found a solution to your problem, iiDiNkStErR!