Should i get revenge on this guy?

He used me for a year, promising me a relationship. That didnt happen. Now i found out hes sleeping with other women because i found a used condom wrapper in his room. I want revenge, i cant let this go. I was thinking about having someone go to his work and pour a drink on him for me. Nothing too bad. He shouldnt get away with treating women this way. Would this be a bad idea?