i've had HORRIBLE luck with Craigslist,i've tried to find just friends on there,i've tried to sell concert tickets on there,i've tried to find someone to go to a few concerts with,and i've also tried dating on there. 99% of the time i dont get any replies or they only write back once. I have made ONE "friend" off there but he's married and a decade older and we'll never meet in person. So,just in my experience,i'd say Craigslist is the worst place to look,there IS a lot of spam on there,fake ads,etc.
As for other online dating sites,not quite as bad but still bad LOL Maybe you shouldnt listen to anything i say cuz i'm bad luck