I just finished my second game on Vassal in which my opponent reported the match results in the ELO challengeboards without first verifying before the match began that it was ELO. I include the ELO tag by my name to make it easy for other ELO players to identify me, and ask for a ranked game - it is not an invitation to report the game without my consent.
To my most recent opponent, if you would like to report the match again, I will be happy to validate it, but in the future, just ask. I would have brought a stronger squad if I knew it was ranked.