Anything that is detrimental to the quality of the league will be punishable depending on the offense. Tanking for a better draft position is one example of unsportsman like. In this case if you are caught tanking to gain a draft advantage you could be held accountable to lose your highest pick in the following seasons draft. 1st offense for a player on a bye week in your lineup or a player deemed out more than 24 hours prior to kickoff will result in a 25 GB penalty, 2nd offense is 75 GB. 3rd offense could be means for replacement.