Haven't we discussed this before? There are plenty of horny people who don't charge a dime on Craigslist.

Now, repeat with me: You can't hook on Craigslist.

The Web site that's gained national headlines for being a dangerous sexual playground is now under the microscope of Charlotte-Mecklenburg police.

An undercover investigation has netted more than a dozen arrests, as officers conduct a sting to catch prostitutes online.

"If the activity goes there the police need to go there to fight it," said Dr. Joseph Kunhs, of UNC-Charlotte, who has studied online prostitution.

Over the past week, CMPD has been engaged in an undercover operation targeting Craigslist.

Among the 15 people who have been arrested are 18-year-old Leslie Rye and 25-year-old Weylin Rodriguez. Officer say Rodriguez was Rye's pimp.

More at Charlotte.com.

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