This is called strawman sockpuppetry. (soundout.org)
This admission of sockpuppetry shocked the writing community and has been covered well by fellow panellist Steve Mosby. (goodereader.com)
The early parts of their great love story, btw, include internet stalking, harassment, and sockpuppetry, with some «let's involve total strangers who don't know or care who we are in our drama» mixed in for extra junior - high ambience. (skepticalob.com)