Can you be sued for credit card debt?

Apparently, yes! That is if you have a steady job and income. If you're a bum who has seasonal employment and changes residences more than you change your pasty Target underwear, you're probably okay. It may become harder to get another credit card once they've revoked your allowance on the one you've just sky-highed, but at least you won't be sued.
It seems then that credit cards are only for the poor and destitute, or at least those who are willing to run when the bailiff knocks on the door.
Read this article from CreditorWeb.

