Somewhat false. When I was 15, I went out to the movies with my friend, and I had a UCSD ID because I was doing research there. I ordered tickets for a rated R movie (17+ for the non-americans), and I presented my ID. I was never asked about my age. So in a way I lied =X
I have never done the above and sneaked into a movie that was meant for people above my age at that time.