Remember when your mother told you "If you can't say anything nice, don't say anything at all."? It still holds, except it's even simpler: Keep it professional

Remember when your mother told you "If you can't say anything nice, don't say anything at all."? It still holds, except it's even simpler: Keep it professional. Just because you feel wronged, doesn't mean you need to bring someone down. Try to resolve things like an adult, it will probably yield better results anyways.