It is strange that these toxic substances are still being inflicted on passengers and crew. One day no doubt we will look back and wonder how it was allowed to happen, over the years this has often been the case in industrial poisoning.
Well do something about it, then. Complaining doesn't solve the perceived problem. If you think there's fumes then take an air sample, for instance. Try to organise some independent research into the subject, get people interested.
What needs to be done is exactly what Safetypee suggests:
The problem requires a scientific approach; establish a viable theory, gather information to test the theory, and repeat for a range of circumstances; unfortunately we are lacking in all areas.
The problem is that this is not being done. Those who are concerned are, effectively, shouting into a hurricane rather than trying to actually understand the situation. That needs to change.