People have been complaining about abandoned teams ever since I stated playing this game, way back when. The response from WIS has always been that a person is free to do with their team what they will (within some reason - which is why there is a cap on the number of players that can be cut and the number of position switches per season) since they've already paid for the seaons (you can't have a car company go after an owner who's paid for their car in full simply because they've neglected it).
As for scheduling, if the team is not in your conference, make sure you fill your OOC games so that the possibility of having that team on your schedule is eliminated. If the team is in your conference, make your OOC games a bit tougher to compensate for any weak teams you play on a regular basis.
FYI: While margin of victory is factored in to your WIS ranking, you max out any benefit at 21 points (a 150 - 0 counts the same as a 21 - 0 victory). Also note, that there's no difference between a team that loses all of its games by 21 point or more and is being actively coached, and a team that loses all of its games by 21 points or more and has been abandoned.