It's best you avoid that Johnny, it's not supported and illegitimate, not to mention. Hacking a machine can only turn out for the worst if you're unsure of what exactly you're doing. You really don't want to risk your computer on bad software and a hack. It could open you up to viruses galore, not to mention you're accessing vital parts of the system software and that's never a good idea unless you're an expert programmer. Honestly, programming is a little over even my head, and I know computers pretty well, at least hardware wise and most software up to programming, which is about the only gray area for me.
It's worth pointing out that as well, no hardware could become harmed through installing an OS itself. The computer itself would remain fully functional. If it works, then perfect. If it doesn't work, then all it takes is removing the OS from your hard drive and you're absolutely fine again (nothing's permanently changed is the point). As a programmer who's personally installed plenty of OSes in my free time, and I have a decent understanding of them, I can say that none of your claims apply, there wouldn't be any more viruses than on a regular mac, the accessing low level software really doesn't matter and isn't even on the client's end (that is to say, Johnny wouldn't ever need to deal with any of it), and it's a good idea for anyone interested.