I was judge at ETC, and it is my wife that is mentioned above. She has requested to not be part of this discussion.
The ref team is currently writing a statement on the controversy between (parts of) team Poland and the ref team. This will be sent to chairmen as soon as we are finished with it. This will however mostly focus on the discussions on team penalties and tie-breakers, not much on bad behavior from their captain. I.e. the events and decisions leading up to the incident this thread is about. You will have to wait a bit to get that part of the story.
Anyway, the events relevant for this discussion is the following: During the award ceremony, shortly after the ref-team's decision that Poland will take the 2nd place, which I announced to them, their captain (Konrad) is visibly very angry with the refs, and I think specifically with me. He comes up to at least one player in the Swedish team (I am Swedish) and slanders me. He does the same to my wife, steps up to her, move in closely and basically tells her I am a horrible human being. I have seen rumors that say he got physical. These rumors are not true.
He steps up to me in a more threatening manner than to the others (physical contact, similar to what a drunk person would do when he wants to innate a fist fight), and verbally insults me (I don't recall the exact words, sorry). He pauses for a second while I struggle to find words to respond, and before I can he walks off. But it was without a doubt the type of thing that should have been an instant red card if it happened during the tournament. Another ref was standing next to me and witnessed the situation. At this time we did not know he had approached anyone besides me.
(PS, the order of these encounters is unknown to anyone but Konrad afaik)
Shortly after we decide we cannot let this behavior slide and give him a yellow card. Yellow instead of a red because at this point in time it's the harsher penalty (red card mean you are not allowed to play anymore, but tournament is over so there is no more playing). Konrad is no longer at the Venue so we cannot approach him with this, and I have not talked to him since.