Problems arise when it becomes a staple food. In Bangladesh, during famine periods, people tend to consume higher quantities of this lentil which is more resistant and this results in epidemics of lathyrism. Memories of what occured in the 1974 famine is still present. You should get all the info you need about this topic from the local institute of nutrition. I would in any case avoid distributing this food as a famine relief food in Bangladesh since you are not sure to prevent over consumption in some cases.
Neurological damage can be severe and is irreversible.
Neurolathyrism - a review and a report of an epidemic.