If that's your stance, then the ethically appropriate course of action is to either avoid places where a tip is customary, or inform the waitstaff up front of your view. Tipping is an agreed-upon social construct and their base pay is structured accordingly; if you choose not to tip yet regularly dine at restaurants then in fact it's you who are acting entitled.
You make a great point. Anyone who wasn’t raised by wolves knows how the system works. Just because you’ve got a pet philosophical grudge against the system doesn’t mean you’re entitled to stiff the waiter. You’ve got a thousand other ways to express your contrarianism: write editorials, stamp your feet, or just don’t go out to restaurants. But don’t stiff the college kid who’s upholding his end of the bargain in expectation that you uphold yours.
I’ve waited tables and I know what hard work it is. To see so-called conservatives taking out their angst on waiters makes me want to barf. Pick on somebody who actually deserves it.