This is more of a question than statement. While discussing a fishing tournament in Grenada last year I had one of the participants mention a technique that I haven't heard of.
The conversation goes like this. The participating team was Prefishing an area and catching fish. They decided to leave the fish for tournament day. Another team sees them catching fish and goes into the area and wipes it clean of fish.
Is this a tactic normally used or just an isolated incident? If this is a common tactic do they relocate the fish into a different area of he lake or take them out of the lake?

I don't tournament fish nor do I have a problem with tournament fishermen. I actually have a lot of respect for them as they can usually catch fish under any conditions.