Dave Ramsey is quite the champion of debit cards. He doesn't want people using a credit card, even if they carry a zero balance, for the simple reason that most people will buy more with a credit card than they would with a debit card. I'm pretty sure that's true of me; I'll be using cash whenever possible. Here's what Dave has to say about debit card safety. The print shows up small on my monitor; if it's too small for you to read, just do ctrl/+ until it's easy to read.
Think a credit card is safer to use than a debit card? Most people do. They convince themselves that credit cards carry a better track record, and you're less likely to have your money stolen from you when you use a credit card. Sadly, those people are wrong.