This is exactly the mindset that leads to the patent system we have today. You are thinking of intellectual property as an idea - its not. Meaningful intellectual property is a functioning method or product that delivers value to people (is this all IP? no, but this the scope of IP I am suggesting protecting). It takes, research, communication, testing, experimentation, failure, and repetition to truly build something that works. And yes, forensics will show the hard drive state and web history logs before, and after you were in the shower and then all the way along the long road to you building something that people actually want.

You hear of an existing product? Who cares? If you can invent something similar without referencing related documentation or code during the actual process of invention keep it out of the legal system.