I need help with a person who keeps bothering me about a ad?

i need someone with a good idea about law to help me. please email me and i will explain eveything. some goof ball wont stop bothering me about a ad i put up on craigslist and i need to know what rights i have and if he is breaking any of them and if i have any grounds to go to the law. i will forward any and all info i have to some one who emails me my sn on yahoo is also rsirois85 please contact me there