I'm thinking about doing something private but formalized, like having a lawyer send a letter to OKCupid summarizing recent events and demanding they take down profiles impersonating me. I could share that letter with my (new) employer if another victim ever contacted them directly. I know it wouldn't really prove anything, but it might be convincing to HR. Last time, the HR representative didn't seem to believe me, which definitely made me feel terrible and theoretically could have affected my career.