Did your question get resolved since 2009.
Great question, was the home being shown at an Open House?
Did the "customer" ask the Host that s/he could take pictures?
Clearly, there is a breach of your privacy if your are living there.
The market was terrible in 2009, Buyers were Circling potential foreclosures
or homes for deals, after viewing 50 homes a day, so it could have been
tough for buyers to keep Tabs.
Was your Agent providing pictures and virtual tours or a flyer.