Rofl. No worries. No one claim credit for scenes. 
They would make some random excuse for it besides its fiction.
Yes. People do claim credit for story as a whole and music. 
There are multiple Bollywood movies made by lifting different scenes and no one can do anything.
For ex two famous movies have many scenes lifted.
Sholay has a lot of scenes lifted from Hollywood movies.
Mohobbatein has a lot of scenes copied/inspired from the movie 'Dead Poets society'. 
Aur TV shows me movies ka scenes uthana is very very common. 
One example I remember is that burning scene and subsequents from Vivah movie was lifted by some Zee tv show. 
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