How do my craigslist ads get flagged down so fast?

i post an ad, completely within the guidelines, and bam, 10 minutes later its gone its like someone is sitting there waiting for me, and flagging me off with a program or something. wtf? i'm only posting my ipod for sale and the fact that it is flagged off so quick makes me think its just one person. How... show more i post an ad, completely within the guidelines, and bam, 10 minutes later its gone
its like someone is sitting there waiting for me, and flagging me off with a program or something.
wtf? i'm only posting my ipod for sale
and the fact that it is flagged off so quick makes me think its just one person.
How do they do it, and how do i defend myself against it?