My response is NOT rhetorical.
Your concern regarding value is valid.
There is an even greater concern regarding the hazard and peril created by losing control of your homes data...>FOREVER!
Your first step, to demonstrate your concern, is to go to google maps and blur your homes image. This is the favored resource of those who want to create bogus data regarding your home.
Next you must advise all those important to you. all your neighbors, those you work with and strangers on the street, when faced with the need to sell their home to direct their REALTOR to NOT syndicate the property on non-professional websites. THis consideration allows the homeowner and their agent to retain control of where the homes data appears.
Then consult your attorney and make the culprits pay. You are suffering harm and distress knowing your homes is exposed to hoards of strangers without your knowledge, consent or approval.
Trulia and Zillow can ONLY hear the voices of those backed by authority.
Best of success.