I politely asked at the beginning of a map for 'ftg'{maticon} to use missionary when he plays in goodfellas. I had spec'ed him a bit on the previous map, and while he at times played a little suspiciosly I did not feel comfortable saying he was hacking. He was doing well. Thus, at the start of the next map I asked him to use missionary. I didn't tell him to go get it. I didn't say leave. I just asked him to use it. After my single comment he began to rant and rave about doing whatever he felt like and calling me and MOB names. He pointed out that he knew I didn't have access to kick or ban him and ranted some more. I only took a couple of ss's of his comments. I didn't get the worst of it, unfortunately. I was just trying to play and ignore him.
He ended up pretty much clearing the server at that point.