To Facebook Or Not To Facebook?

That is the question facing several Realtors today. Newsweek recently printed an encouraging article asking "Can Facebook Revive the Real Estate Market?". With the recent downturn, Realtors around the block have been turning to social networking sites to tout their wares. Being a Realtor naturally lends itself to being social, and what better place than a networking site, to expand your sphere of influence?
Well, apparently Facebook is not so keen on Realtors. FutureOfRealEstateMarketing.com recently came across an exchange between a Realtor and Customer Service. Facebook does not allow listings on personal pages citing a type of invasion of privacy. However, paid social ads are acceptable within a certain context with the success rate being rather hit or miss.
Personally, I see it as a pretty fine line between accessing a database of potential clients with a low-key approach and exploiting the site with a tasteless "in your face" sales pitch.
Many sites have areas or groups set aside for such pursuits. Perhaps an unspoken, online, code of ethics is developing in the industry... where do you stand?