A video featuring a paladin named Leeroy Jenkins of the guild Pals for Life from the Laughing Skull Server became one of the first major World of Warcraft memes. In the video, a paladin foolishly runs into a nest of eggs which ends up killing his entire party in the Upper Black Rock Spire Rookery.
While neither drinking or the use of drugs are signs of an abusive personality, heavy drinking or drug abuse may be a warning sign and do increase the risks of abuse, especially violence, taking place. Often an abusive person will blame the drink for his/her abuse.
Some of the other characteristics that sociopaths may display are stealing, lying, lack of remorse for others and towards living beings, irresponsible behavior, impulsive behavior, drug or alcohol abuse, problems with the law, violating rights of others, aggressive behavior and much more.