Facebook gun picture causes official alarm

It is imperative for parents and users of Facebook to be mindful of what they post as their profile picture, you never can tell who  would view that picture..., and probably marks it as 'offensive''.
A new Jersey man, Shawm Moore posted a photo on Facebook which showed his 11 year old boy handling a .22 rifle. This act was informed by an unknown woman to the police, the police thereafter paid Shawn's home a visit.
While narrating his story to a forum, Shawn said his wife sent him a text informing him that police and alleged DYFS, Department of Youth and Family Service had paid them a visit, it wasn't a social call. Shawn went on to say that the authorities wanted him to open his safe where his guns are kept, but he refused because, no warrant was presented to him and that the woman who phoned the police of the act, refused to reveal her true identity.
He, however, said the gun was his 11 year old son birthday gift.