This one is not the worst, it's just typical. In the picture (click for larger), you'll see that this company is "CreditOne". Their logo looks deceptively similar to CapitalOne, that's the first thing that bothered me. And you're "pre-approved" unless they decide you're no good after all. Well, even legitimate companies pull this trick, so I can't complain too loudly. By the way, I think the pretend credit card that companies attach is kind of insulting; we know what a credit card looks like, Leroy. There's an expiration date, but so what? It will overlap with the offer that they'll send in another week or two.
This next picture is where I want people to pay close attention. The Annual Percentage Rate is not all that impressive, but keep reading. There is no grace period for purchases. Most legitimate companies will not charge you as soon as the purchase hits their computers, but these exploiters jump right on that. So throw out the concept of the ideal credit card use, where you use it during the month, get the bill, pay it all off and do not pay any interest. Not these guys.
And what's that? An annual fee! Not a chance, Chauncy. Cowboy Bob doesn't pay for the privilege of owning a card and paying your other fees. No siree. Oh, and there's a fee for an additional card for another user, but that's hit-and-miss with legitimate credit card companies.