Depends on the nature of the woof. A woof regarding a specific contest will only affect the outcome of that contest. This has been known to happen, especially to teams such as the Bills, Braves, and Blazers, who do well in the regular season but falter in the playoffs. Although little is known about this, the woofing Gods sometimes, in response to a particularly vicious woof or anti-woof, allow a team to win enough to make it to the playoffs, only to smite them there. Much research needs to be done in this area.
Some woofs are inherently ambiguous.
In cases where the intent cannot be determined, the woof will be ignored. Yes, there is. Keep your trap shut. In fact, it proves beyond a shadow of a doubt that OWT is indeed true. Given the choice I would prefer the theory be true because nothing would please me more than to see the Irish winless for eternity.