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Watch the video again :) You will see that the Bird of Paradise is not the poisonous one, it's actually the Angels Trumpet that is the bad boy ( or Girl ) in disguise. There are many many dangerously toxic plants in public places, but many people are just not aware of them. I guess they just take the risk....and we hope they or their kids don't eat them.

Ok, sorry. I see I was also not aware of bad angel trumpet. Still better than to fall into it :)