JUST STOP. You've had plenty of opportunity to rank players BEFORE the tournament started. If someone isn't properly ranked, that's on the Div Reps and LO... DO YOUR JOBS! ... Sandbagging will apparently happen REGARDLESS, no matter WHAT YOU DO! Quit penalizing players because your system SUCKS, and you're just plain lazy!!
For starters, both teams turn in scoresheets. If Team-A's inning count has a large discrepancy, it might be a sign. FIND OUT WHY! Send out the sniffers. Watch the players in question. Pay particular attention to their scores for a bit. And God forbid you have to get off your asterick and go watch a match!
Quick background on this. Our LO asked if we could take a teams spot in a regional qualifier held on Saturday OVER MEMORIAL WEEKEND (end of May). The team we replaced was already qualified so they bailed. It was exactly 1 week before the tournament. People already had plans, but we scrambled and managed to field 5 players, including one who would've received triple-time at work that day. Everyone else was out of town... After our first match, the LO arbitrarily ranked-up 2 players. Both players have established histories, and a solid baseline for their current SL. Regardless, BOOOM. First match of the morning under our belts, and we're DONE. Everyone was extremely unhappy... The LO blamed "the computer" for the ranks, then pointed the finger at one of our other lower-level players, because he wasn't present.... Nevermind that he wasn't even in the state at the time... In summary, we pulled it together for a holiday weekend within a weeks notice, then proceeded directly to get screwed for our efforts.