Seriously, if your image content being stolen by screenshots is causing a problem for you, you should think about why its being screenshot in the first place and solve the problem at its root instead of playing the cat/mouse DRM game.
My first thought for why someone would want to defeat screenshotting was banks trying to make their websites more secure. I confess I can't quite see how this technique would help their use case.
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Seriously, if your image content being stolen by screenshots is causing a problem for you, you should think about why its being screenshot in the first place and solve the problem at its root instead of playing the cat/mouse DRM game.
My first thought for why someone would want to defeat screenshotting was banks trying to make their websites more secure. I confess I can't quite see how this technique would help their use case.