That's why almost Debit cards can be used as Visa cards, with full protection. If I'm away from home, I can even get emergency funds on my debit card, even if I don't have money in my account. That's just cool.
I demanded my bank issue me a debit card expressly not enabled as a credit card. The problem with so called "check cards" is that they can be used to make credit card style transactions without requiring a PIN entry, as well as debit-style transactions, which are protected by PIN entry. However, in either case, the funds come straight out of your checking account!
I've got more credit cards than I ever use, and the last thing I need is someone stealing my debit card and charging up a storm. That's a lot harder if it can only be used in debit mode (PIN required).
With a credit card, if there's a problem, the credit card company has to sue you. With a check card, you have to sue the bank. Plus, with a credit card, you get several weeks of interest-free float, as well as rewards points. And, if I'm away from home, I can use either type of card to get emergency cash.