If someone post's on your page try not to remove their add by your own without any proper or legal information, otherwise post directly, i have heard from my that, without any legal intimation you are removing their add's by your own that too morethan several times.

So consider it as suggest and advice, you are supporting the needy and meanwhile people from diff communities and countries using your page to help someone who might be in need of job, particular service or thing.

so before removing any post think or atleast you should leave 15 days option to display their post.

Thanks Dear Montu.