The people who are against Obamacare but concerned about their Medicare benefits come to mind. Pick one. You can't stand on principle about one aspect of an issue and then change your mind when it suits you financially. "The only good thing about Obamacare is staying on my parents insurance until I'm I'm 26" <- Heard this so much from my classmates at a very conservative university, pissed me off so much.
Why does it piss you off? Why should the not use it? The government takes your taxes and you can't do much about it, so its only fair that you can use the government services as much as they let you.
Lets say person X wants to have a private bus system, would you call him a hypocrite because he rides public buses as well? I can except and live within a system and still prefer a different system.
I didn't say they shouldn't use it - I'm saying pro-Medicare shouldn't be part of their political dialogue if they're opposed to Obamacare on different principles. I've heard a lot of folks who think Medicare should expand argue against Obamacare on the premise that anything but a free market is morally wrong in that case. It's just a case of "this thing that benefits you is morally wrong, but this virtually identical thing that benefits me should grow because it benefits me". By all means use it if you qualify and paid your taxes, but don't be a hypocrite when it comes time to campaign or vote.