No not poison, but I've been wondering if the lasers could harm anyone's eyesight, human or wildlife. Blind bees? I suspect the incident rate would be extremely low to non-existent.
They're targeted beams. They won't be scanning at eye level. Any pollinators harmed will probably be extremely small in number, and there might even be updates to the computer vision routines that can minimize that harm.
This is going to be very good for the environment once it takes off.