That reminded me something. It once happened to me one player who lost a stack to me tried to insult me as much as he could, swearing, calling me names, suggesting vulgar sexual activities, etc. I didn't care much, but it was not normal. I checked if I can report him, couldn't find such option, so just ignored it, focusing on playing.
Usually in any multiplayer Internet games you can report such behaviors. I do not know any other poker rooms but in GG I do not find such thing.