It's certainly conventional wisdom in financial circles that a SAR is worth about as much as a user report on a Reddit comment.
You’re asking for something to be proved - or supporting evidence that requires a whole dissertation - because your exposure is starting from a position that is fundamentally wrong.
“Suspicious” is a misnomer referring to an automatic reporting threshold, that in fewer additional circumstances allows for discretion in filing. The end.
I’m baffled how asking for data is revealing my position?
I had the hope that your position is well founded and it would be easy to point to actual data.
I hardly believe that the compliance laws are not accompanied by studies that collect the data that i asked for. So it should be out there.
Good luck.