I've never heard that one before, but there is a psychiatric illness in which people believe themselves to be watched at all times and that the world around them was created specifically for them, et cetera. It's called Truman Syndrome.

All I know about schizophrenia I know from the copious number of psychiatric volumes and memoirs I've read. I have an older cousin with paranoid schizophrenia, but I don't even remember the last time I spoke to him.