I found out that the person in charge was cheating the system. Can I email them with the ims and emails he sent to me threatening me?

I hosted for a gaming league online. I found out the HA = Head Admin was cheating the system by getting his TDS = Tournament Directors, HTDS = Head Tournament Directors to jump in tournaments instead of players to fill spots. In cases (the people who run the website for you) that is cheating. I have all the ims and emails threatening me. Should I send them in and show them how rude and threatening he has been to me?