I did, the main issue for me was actually getting the exploit to work. And yeah, Keeping your console disconnected from PSN will keep you from getting banned. I think there's a way to remove the ability to do that without jumping through a bunch of hoops, but I haven't done it myself.
Thanks.
I'm not interested in playing any games online so that's good. I'll just keep my PS3 unplugged. Updated Zone of the Enders 2 beforehand knowing that going in so otherwise I'm good.