Crapping on a benefactor is a recurrent phenomenon

 Can't help but notice it.  It isn't an isolated event.  Just have a close look around and maybe you'll notice it a lot.  

Update after a little while...

Just to clarify, try looking in the mirror sometimes. No, I'm not on a high horse here. I think almost everybody does this, unless those who do not, who make it a part of their natures to be grateful. I'm not claiming to always be grateful, or being even slightly grateful. So, this is not a high horse sermon.