Originally Posted by Scott
The swamp cannot be played as OB because it is not clearly defined.
Also, for purposes of a tournament, an area is only OB if the tournament director clearly states beforehand that it is.
Scott's right, it is only marked as a swamp to warn folks of it, not to mark it out of bounds. During tournaments it is up to the TDs to make it out of bounds or not.
As far as making it an incentive to stay out of it by marking it out of bounds, I don't think folks purposefully throw into it to begin with, more of trying to make it across and failing at it.