Yexicon is habitual problem user Cca. He attempted to use a proxy to disguise his identity and failed. I am not going to list his previous accounts because there are so many (over a dozen, easily) it would just take too long. Also it's hard to get the list exactly right because of his habit of stealing keys and forum accounts from people and sharing them with other habitual problem users. He was banned under the "do not come back" purge and I'm pretty sure this isn't even the first time he's come back to be banned/deactivated again.
Any time you see someone go out of their way to defend a stuffbag like hammereditor, you can bet that it's some other stuffbag. There's just no other reason for it.