Sadly, this happens every once in while. I read story some time ago about an angler who caught his top 5 fish a day before his tournament started. The angler proceeded to leave the 5 fish well anchored on a stringer. His planned was foiled when another angler, happen to get snagged on this guys stringer, and he found the 5 fish. This angler told tournament officials, and they did a sting operation. The fish were placed back where they were found, and law enforcement waited the guy out for him to return. When he did, he got busted, and banned from all tournaments.