Be wise when posting your photos to a online photo sharing site or a social networking website. Recently, I read an article from Yahoo about a family photo posted on a person blog and a few social networking sites showed up in front of a grocery store front window in Prague in the Czech Republic.
You can see how easy people can get your photos off your blog or a social networking site without your notice. We've heard enogh about how the photos of celebrities were being manipulated by someone. It might be worthy to change the resolution of a piture or put a watermark on the photo before posting it. If you don't want the entire public to view your personal photos, you might want to consider to Restrict who can view them. There are many sites or blogs have the capability to select display/viewing mode, such as public vs private. If you are sending an attachment of photos to someone, I would strongly recommend you to use one of the encryption methods with password protected, such as WinZip.
Full article can be read from:
http://news.yahoo.com/s/ap/20090611/ap_on_fe_st/us_odd_card_photo_prague