I used the search for a photography forum, and guess this is it.  Here are the guidelines, and several of those images do not fit the guidelines, so what are they doing here?  The issue at hand has been bolded by myself in these:

Please read the following guidelines before uploading image to the Photography Gallery

 Please review the thumbnail guidelines before uploading and images that contain nudity and or violence
**The Photography Gallery is for original photographs ONLY
** Do not upload images you “found” on the internet
If you are NOT the photographer but have permission to upload a photo, please choose the snapshot gallery
If you are using stock photo’s for manipulations, please choose the mixed medium gallery
If your image contains non-photographic elements, please choose the mixed medium gallery
If your image is processed to the point where it no-longer resembles a photograph, please choose the 2D Gallery