It's impossible to leave the game without losing points, unless you are able to contact a mod with proof of the incident before the game is over. He/she could then boot the player from the game.
If you cannot contact a mod, take a screenshot by press Alt + Prt Scr. Then go to a program such as paint and save the file as a JPEG, so that it is less than 200kb. Next log into your e-mail account and attach the file to an email and send it to moderator@flyordie.com. This will result in a punishment for the player.
Smack