This is a completely public forum. Anyone can see photos that you post here so you need to determine your level of comfort. I don't post photos of my children (or use their names). I have only posted photos of myself. I don't post anything in a public forum (or anywhere online for that matter) that I wouldn't mind seeing on a billboard in Times Square or for anyone to download to their own computer. We have people here that do post photos and names of their family, locations and other personal information. It is just a matter of how you feel about your information being available to everyone online.
Also keep in mind that when you post photos they have to be uploaded to a photo hosting site and depending on your privacy settings there people may be able to find personal photos and/or information even if it isn't posted here.
Not sure that I helped you to not worry, but I think people do need to be very careful about what they post online. I cringe sometimes over the things that people post on public forums for anyone to see. Often they provide enough information for someone to know exactly where they live, the names and ages of family members (including children) and when they will be away on vacation or even just out for the night. We tell our children to be very careful with all they post online but then their parents put all their personal information out there to the world.