If anyone ever makes their way to the "Yard", they have a no-scalp zone where regular people with extra tickets can unload them for at or below face value. I'm not sure if they have this at every ball park, I've only been to a few.
I've done this several times with no problem & gotten some awesome seats....usually you end up paying under the ticket price, and usually you're sitting next to the person that sold them to you for a song. Buy 'em a cold one & a good time is guaranteed to be had by all....even if no one parks one deep into the Boog's BBQ sauce over the right field wall. (Boog, you got nothin' on Steve
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