Those aren't the type of people you need to worry about though - it would be the sly ones, and they are hard to know who they are. They are friendly until they

Those aren't the type of people you need to worry about though - it would be the sly ones, and they are hard to know who they are. They are friendly until they don't care to be. I'm unsure if people purposely do this or they just become inspired by the ideas, feel they could do them on their own, and then start - I'm sure there's a mix, though you'll get a mix of honest and dishonest people in the both groups, the ones who are willing to sign the NDA, and those who aren't willing to.