Let me give you my perspective. I went to college at 21, years after graduating high school and living like a legal adult. I'd already lived away from home, lived alone, lived with roommates and had experiences as someone who is solely responsible for my own behavior.
When people were, for the first time in their lives, going to bars like it was magic...I'd already had my fill and had zero interest in drinking, keggers or frat parties. I saw many things and did many things that kids just getting out of high school and going straight to college had zero experience with.
Down to even simple things like "Gosh, I've never not lived in my parents house and had a curfew." I had to ask people more than once, at 4am, to please pipe down while playing Halo 2 and not to be so damn loud.
I felt like an adult surrounded by a bunch of highschoolers who had just been taken off the chain.
My first roommates. Pair of friends. Decent guys, younger than me. We got along mostly. Why did I end up getting new roommates?
Because one night, one of them thought it was kosher to bring a girl back to the room at 2am, while me and the other dude were asleep, and bang her not more than 20 feet away from me, and 5 feet away from his roommate. Ever listen to two people fuck when you're not part of the equation, like it's happening at the foot of your bed?
You think drunks are bad? Man you don't even know.
I didn't report them to the RA, even though I easily could have. I asked him simply not to do that anymore, and of course he objected because he was a thoughtless dickhead with a childhood friend at his back. He'd just successfully had the quintessential "getting laid in college" experience, after all. So I requested a new room, instead of narcing him out like part of me really wanted to. Because even though I was pissed for several reasons....I couldn't deny him his right to life. That'd make me the asshole, ultimately.
My second roommate was a preternaturally quiet Christian who made zero noise, spent only 1/3rd his time in the dorm and eventually was rarely seen at all, until I left the dorms. And even HE didn't like having a roommate. We had perhaps the most cordial non-friendship relationship you can have with a roommate, and his discomfort was obvious to me from day 1. Because he'd a) never lived out of home and b) had never had to share his space with a stranger.
People come to college at different levels of life experience. And if it's one sense I got from many of the posts, well-intentioned or not, is that many of them have never lived on "the other side of the tracks" of life experience. Which isn't their fault. But they should remember that college is a place far-removed from the non-alcoholic, clean-living days of high school (lulz). If you managed to make it through highschool having never partied or even gotten to know people that party....college is where it happens.
Like I said initially. We don't really know. Maybe he did save this dude's life. But on the flip side, I imagine me or just about anyone else I know, getting in trouble with the residence hall (which may cost him his academic status, it happens) and the drama of paramedics and the cost and all that.....if I weren't dying, I'd want someone's ass. I was a good partier, I kept my life out of my roommate's life as much as possible. And this is one instance where I think the OP inserted THEIR life experience into this guy's life. And that....from someone who has had a grip on what they're doing to their body since they were 13, would make me really, really, really angry.