This would be no different than someone pre fishing before a bass tournament and then throwing the lunker back in the lake after catching it hoping he might catch it latter.
Except pre-fishing (at least usually up until a certain time) is within the rules. Bringing hogs to weigh in that have been previously caught prior to tournament hours is not.
Notice I said in the question "in preparation for your teams participation."
If a person practices barring of hogs solely because that's the way they were taught to hunt (as has been previously stated) then the polygraph question would be a non-issue.
Now if someone is cutting hogs for competitions sake, watch out. In that case, what would be the difference in catching boars, cutting a leg off and turning them back loose making them easier to catch again. Hypothetical, but I think you understand my point.