The MS "About Me" section is a place where one presents a cameo of who they are. His long commentary is chock full of his ideology and for whatever reason is what GZ wanted the public to see. His MS page is wide open. MS offers privacy, friends only viewing, limited viewing, etc but his is wide open.
It may be true that he got his Moniker from lyrics to a rap song yet it is the meaning behind his choice that indicates what he wants to use to represent his persona. For that MS page, it is about being or sounding "Hard" (a modern day version of "tough.")
In the context of the above, if he had truly "turned his life around," then why was he still modifying the page up until December 2010 (the music section was modified then) and why leave it "public?"
IMPO, the MS page and the dates he visited that page are relevant to the manner in which GZ chose to represent himself...even at age 26 or 27... when he had a chance to modify his "About Me" status and he didn't.
It is just another piece to the large puzzle that makes the whole of who GZ was and may still be.
All theories about who GZ is and what his motivation, that night, was have yet to be proven. I am open to the possibilities only one of which might be that he had something to prove to his friends, his neighbors, the police, his father, etc and that he knew full well that the person he was after might end up dead.
If he really never thought TM might end up dead then he was simply naive. I have a hard time believing that.