Hi, I've found a very good site (from idealist.org itself) where you can post photographs about various social issues.

Their banner is like " Upload a photo and help bring awareness to important issues around the world. You can inspire others to become involved.". Please visit the site and start uploading, I hope you will enjoy it and be proud of it, if your even small contribution can make a person smile.

Here is the link: http://www.collectivelens.com

Thanks - andy