I ran Linux on my PS3. I was a bit annoyed when they removed it, but not hugely, because it ran like a dog. Now we have a bunch of toy-out-of-the-pram arseholes potentially nicking my credit card details because they can't cope with the fact that Sony won't let them pirate games. I'm prepared to get massively downvoted for this, but the facts of the matter are:
1: as above, Linux ran like a dog on the PS3. The only reason people would legitimately run it were if they were running it in a cluster or if they were genuinely interested in programming for a different architecture than commonly available, but
2: the number of people doing this are miniscule, and probably wouldn't care if they still has access to the PSN or not
3: To everyone about to say 'it's my console, I paid for it, I should be able to do what I want with it', well so should I. And I want to play games (yes, GAMES on my GAMES CONSOLE) without wallhackers, aimbots and other tossers wrecking my experience on MY console that I paid for, bringing us onto
4: as with people who wanted to play around with a new architecture, I'm sure there are some very clever homebrew guys who would do some very clever things. But the vast majority would be pirates. And if that got widespread, that would wreck the quality of games for everyone.
Cue the whining...