Fascinating. No time to read all of it in one sitting, but I'll probably revisit in the future.
I'm with ktkatinmn - wondering if he really was depressed (if there ever was a suicide that *wasn't*, and also wasn't triggered by an external reason like terminal illness or family finances, this is the one suicide that wasn't borne of depression).
I hope he was right about his brother and sister - he basically said they weren't close to him, and that they'd cope with his suicide just fine. That kind of assumption seems like a bit of a gamble (especially since he likely hadn't polled them beforehand - they didn't know he'd been planning it), plus the whole world can now read that part, potentially hurtful/embarrassing for the brother and sister. Regardless of different people's reasons behind committing suicide, one common misconception is that their loved ones won't really care/mind if they kill themselves, and/or their loved ones will be better off without them anyway. ("Loved ones" is a stretch, though, concerning Manley and his siblings, at least according to Manley's own words.)
"We've had threads about guys fucking picnic tables, animals and dead bodies. Third boob ain't going to stop a damn thing." - cleanskull