Oh my goodness... I saw some photos of people on this site... who posted here... and they were abused. I'm so livid. I'm messaging the admins... As a reminder... anything you post on messages here can get picked up without your permission.
Update: to clarify... individual messages sent through the "Personal Messages" section is not what I'm referring to. The forum messages do get picked up by google or any other archive.org system that would scan here. So... if you value your privacy, just please keep that in mind so your personal photos are not abused.
If you would like to know if your photos are currently out there on google, just carefully scroll through the following:
Once you get to the bottom, you'll want to load more results. It does appear that if you then remove your posting and associated photos that they will be removed after a time from Google.
If you find a photo of yours that you would like prefer be kept private... what you'll have to do is click on it from Google. There will be a "Visit" button. That takes you to your post. Here, you can remove the photos, if desired.
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Update: My guess is that the admins may opt to edit the robots.txt file from Google for this site. In that case, no photos would be picked up by Google. However, if you want to be 100% sure just manually remove the photos you want private.