A friend of mine recently took to social media frustrated at how close a McDonalds ad is to a music video he co-directed:
This is the music video, Ma’agalim: https://vimeo.com/162052542
McDonald’s commercial: https://www.youtube.com/watch?v=AdzbAEYxILU
There is a side by side shot comparison here which show how close the two are (if you are able to view): https://www.facebook.com/photo.php?fbid=10155173270732009&set=a.10150292529052009.384361.635632008&type=3&theater
I offered to boost the signal amongst the animation community here, and I have no doubt others have experienced their work being heavily appropriated or ripped off as well.
They creators of the music video have received advice that it's not worth pursuing legally, but perhaps someone has some wisdom of how to deal when something like this happens to you?