There is still massive under reporting on the 146 ref fumes and air quality in general. The big incentive NOT to report it or enter anything into the techlog, is a compulsory visit to the local A & E department, for very painfull Arterial Blood samples to be taken if you do make an entry or file any reports.
I would suggest that this is merely the tip of the iceberg really.
How do you address the under reporting issue?