No ex in the romantic sense, but an ex-coworker who'd always talked down to me, and dismissed my contribution to the team and admitted that it was because I was obese, and therefore obviously 'weak, and lacking in self-control'. Saw her later at a conference. She weighed more than I ever had, and couldn't keep up with me walking.
For a while I did want to get back at an ex....then I realized his pathetic *kitten* isn't worth my time and even when I wasn't in great shape, I was still too good for him. Besides, all my exes miss me - fat or not b/c they have all realized with the girlfriends after me, that no woman would treat them as well.
Guilty - but I have to add that I also want the "pretty girls" from high school see that too. Shameful, I know!