The least they can do is inform the photographer.
But no, they take, they use and they get the credits.
Stupid isn't it!
I like what Lilian said:
"And dun farking suggest to me to watermark my photos because people like us don't do such childish work. Only tarak standard people will grab pics from internet and use it for their commercial purpose without giving credit. People like these are like thieves. Or maybe warlords who think we minions are your slaves with cameras running around. Mind you, that camera is half mine, ok? It is my own personal lens."