ive quit many jobs. 2 week notices are for tools.
Word of wise to any younger kids reading this thread: do not heed this advice.
Putting in a two week's notice helps the manager(s) work on filling your position before you leave, meaning if you are in a high importance position they won't get screwed by the workflow being interrupted as badly as it would've if they had a replacement in place for when you leave. Plus it's a matter of bare minimum loving human decency.
It doesn't matter how much you hate the system or how you work on your own terms, it's better to put in a two weeks notice than to randomly not show up to work that day. Not only can you earn yourself a nasty reputation, you're screwing over the people who took the chance to hire your sorry ass in the first place.