We took my youngest daughter and her friends to a Harry Potter movie for her birthday; about 10 people, including my wife and I.
We sat about 4 rows behind the group. While waiting for the “previews” to end, a scruffy ne’er-do-well arrived and sat right behind the group. I moved to a position immediately behind this perv and, in a low voice, told him that I was committed to watching him and not the movie.
He left about 15 minutes into the movie.
Good call!