From the horses mouth......
M-Reg Global reported doing a dodgy charter, reported by some stiff with CFMU access as illegally doing hire/reward in the middle east. UK CAA involved as the intial organisation to receive the report.
They have to be seen to act so insist the IOMAR do an investigation only to find the aircraft legitimately sat in Teterboro 7000 nautical away at the time with the owner enjoying a few days in the big apple.
So 5 or 6 Senior man days at director level garnering evidence to prove the operators innocence and a labour bill in excess of five figures....
Original reporters response "Oh sorry, it was an aquaintance who told me about it"
So I suggest unless you PERSONALLY have HARD EVIDENCE and can PROVE your case you come to the conclusion that everybody else has.... which based on the lack of successful prosecutions its not a big a problem as people like to make out.