I think this tree has a worse reputation than it should have, it is not as poisonous as many other plants we have in the garden.
I think the stigma comes maybe from small children eating large quantities of the seeds thinking they were peas.
According to this website nicotine is more dangerous
http://www.thepoisongarden.co.uk/ato...nagyroides.htm
(I have had two dreams recently to inform me to take certain herbal remedies, one for Hibiscus flowers and one for Papain )
On the subject of poisons I just found out Chicory is also poisonous in large quantities.