I don't have a GF, but I'd probably either laugh all the same or I'd do the typical "Euwgh!" reaction of the 2 boys who annoyed that principal so.
Finding out you were being stalked by some creepy crazy old man for no logical reason.
Love me, I win.
Hate me, I win.
Ignore me, I've got exactly what I wanted.
Love me or hate me, you're still thinking of me either way.