Why do you obscure the eyes/face of minors in your images?

Although the beneficiaries of our programs are aware that photographs may be taken of them (thru verbal or written consent), it is difficult to explain "informed consent" to minors who may not understand how their images may be used.  In an effort to protect the identity of the subject, we obscure the face when we use images with minors that could be potentially identified by the posted image.