omg calm down its a public site that lets us use the picture. if u not going to help then don't post.
Anyone can
say they have permission to use an image, but you should also be aware that because an image is posted on the Internet
does not automatically make it part of the public domain and is still protected by federal copyright law.
Most photography forums state in their TOS or rules and regulations that they only allow posting of images the poster owns the copyright to, and any other images need to be linked to because of federal copyright law.
TPF, like most forums, states in it's R&R's you need to provide written permission from the copyright owner before you post images that you don't own the copyright to.
Adding a watermark/logo to a photo is a basic image editing task and there are literally hundreds of online tutorials on how to do it. I suggest using Bing or Google as your search engine.
The logo/watermark should really to be created by a professional using vector graphics and not raster graphics so that scalability is not an issue.
I use FastStone resizer to add my sports photography business logo/watermark to as many as 1600 photographs at a time. It takes FastStone about 45 minutes to batch process that many images.