Craigslist has announced a crackdown on classified ads offering sex for money. Therefore, prostitutes everywhere will have to come up with alternative ways to promote their illegal services.

Samantha Jo Daniel, 18, was arrested last Friday after cops learned of a handwritten offer scrawled on an elevator wall in an apartment building in Marshalltown, Iowa. The guerilla advertisement read, "Will F%ck for $," and included a phone number.

Daniel was nabbed in an undercover sting operation and charged with a misdemeanor prostitution count, according to a police press release. "In other cities, you hear about it in the personal ads and on Craigslist, but we just don't see much of that here," one police official remarked to the Times-Republican newspaper.