Someone made a fake account under my name awhile back, what can I do?

Wow she seems weird and mental..i looked at her yahoo answer profile and i see anyone can email her..if i was you i make a fake profile pretending you were a dude or something and get to know this person ..then you can say oh i see you have another profile and ask why that is..get into her mind by pretending to be someone else then you will find out why this crazy chick is doing this