What Type of Links are Safe?

What type of links can you add to your fan page and fly under the radar?

I would image that any naked affiliate link would get taken down quickly along with the page.

What about redirects with a link that does not look spammy?

How about where the link goes, if it is a simple redirect to an offer I would think that would get take down, but what about a non spammy link to your landing page that is a poll or soft sales/squeeze page?

Thanks.