I use my credit card for almost everything, and every time the salesclerk hands me the chit to sign I ask him or her, "How do you spell Barack Obama?" Without fail, the salesclerk laughs, and usually asks why. I reply, "Obama wants all my money, so he should pay my bills." Sometimes the repartee extends to, "I know, I know, he'll just bill it back to me...and add a fee on top of that!" It's all fun, me keeping a smile on my face and speaking with a chuckle, and the salesclerk's eyes often widen at realization, especially if one of those who paid $100,000 for a college degree and not being able to find a job above the level of high school dropout.
Try it. You'll like it.