Resigning games when you are not lost. Accepting multiple wins from a player who is intentionally losing. Playing the same player repeatedly during your provisional period in order to get an artificially high rating. Playing most of your games against provisional players during your provisional period is another form of abuse. Using a computer without telling the administrators or without putting a note in your finger, or without getting your account added to the computer list.
People have the right to know whether they are playing a human or a computer.
Allowing another person besides you to play rated games with your account. Using another player's account to play rated games. Playing games against yourself on a second account. Receiving help from another player or computer while playing a rated game. Playing the same line over and over against a computer, to gain rating points.