I gave a guy I know a present with a secret hidden camera inside.
Oh, my. What are you planning on doing with that camera?
And? Why do you wanna know?
I find it very despicable of you to spy on someone and disguise the camera and hide it within your gift. I suggest that you get that gift back from the person, and try to confess to them your intent and see if they can forgive you about it.
I don't care, they deserve this because they make it hard to get along with them.
Even if you don't like someone, that doesn't mean you should spy on them. Spying on people is a major invasion of privacy, and it is disrespectful to do that.