I would ask the same thing.  It's not identity theft; it's identity switch.  But in some ways it amounts to the same thing.  What's up with this?  It makes me totally ignore who I am reading or talking to because I have no trust in the continuity of the person's identity.

It's okay to do this, but not okay to post a link to thesilkrdotcom.  Scratch my head.  Go figure.