Accepting credit cards is done almost everywhere, but I wouldn't say that it's so assumed that not advertising that you don't take them is "tricking" customers. He offers a 100% interest free no collateral loan as an alternative.
I check for the Visa/MC stickers on my way into every establishment I visit. People tend to ignore them, but there's a vanishingly small percentage of stores that take credit cards and don't have the stickers.
