PROVIDENCE, R.I. (Reuters) - Her name is Susie. Her profile on Yahoo says she's a student in Australia, "single and looking." The problem is what she's looking for. If her profile is to be believed, Susie is just 13, yet she has been found freely surfing "adult" Yahoo chat rooms where, in some cases, the topics are often too twisted to list in a family publication.I worry about kids like her. I'll bet her parents don't know what she's up to.Keeping an eye on children as they surf the Internet has always been a challenge. Savvy kids know how to...