That's actually not true, Myself. There are two ways:

1) recently (don't know exactly when), Frappr made available a feature to create an account. If you create or created an account prior to putting yourself on the map, then you can log into your account to edit or delete yourself (or in your case, myself)

2) if you added yourself to the map prior to the "account" feature, or if you didn't create an account, you can PM me here or use the Contact Admin feature (which does work -- I just tested it) and ask me to edit or remove you.