Did you know that you can save an image- and upload it to search for it's source?
http://www.geek.com/articles/news/google-image-search-update-lets-you-upload-an-image-and-find-its-source-20110615/So basically that means if you don't want to tell people exactly where you are getting married- but then you upload a picture of your venue on here from their website....I can save that image- throw it into google and figure out where you are getting married?
I'm not sure if it works with avatars (i.e. bringing people back to a facebook page, maybe?)
Just an FYI