I too, flagged him for foul language...
About 85% of the time, postings that are flagged are properly flagged. It can be something as simple as the guy used a third party picture posting service. Craigslist allows 4 medium size photos at the bottom of the ad.
If the guy with the speedboat cannot read the user agreement (that he MUST click "I agree" to to get the posting out there) and follow the rules, he doesn't deserve the right to use an INCREDIBLE free classified listing service like Craigslist.org