Not 100% true.
I have been Jailbreaking for a loong time, and not once have I run into any problems. This "bricking" argument is really getting on my nerves. I have messed up numerous times in the Jailbreaking process , even shutting my computer down in the middle of it, and there wasn't a problem. I don't know when or how you Jailbroke, but it takes five minutes, is EASY to do, and has a .1% chance of anything going wrong, supposing your not dumb. As for the warranty thing, my warranty is out, so I don't have to worry about that, but if I did, the only way an iDevice would not be able to be restored is if it's physical damage. If that is the case, they won't check for your jailbroken state. I sen't my iPod Touch in because the headphone jack didn't work, and it was jailbroken. They fixed it on my warranty and didn't say hoot about it being jailbroken. If its software related, you need only boot into recovery mode. as for malicious packages, I have installed 100's of them, and have never encountered a problem. I download from official sources, and research each tweak extensivly before I download it. If It caused any kind of problem, I could A, uninstall it, B, if A doesn't work, do it from safe mode, C, if neither A nor B work, plug it into my computer and delete the dylib files. Easy! And the LSD is a bad analogy. If you take LSD, there is a 100% guarantee that you will have negative effects. you can't get around them by being "careful". A better analogy would be a Mac thats limited only to the Mac App store. Sure, there are great things on there, but you can't download anything else. Why? Surely all you have to do is be careful about what you download and where you download it from? Nope, its very dangerous!