I lost a cat to them, & had a dog barf all
over the house after eating part of a leaf.. close enough to poisonous for me.
I've composted them for years, bcuz they always die during the summer. (Handy time for them to die, though.. so they can be composted). I run everything thru the lawnmower in the summer, then dump the bag in the tumbler. Well, used to dump it on the pile & then turn the pile. But I'm getting away from that; the tumbler does a more thorough job.
In the winter, I run most everything thru a blender kept just for that purpose, or sometimes a food-processor (also kept just for that purpose). (Lo-ove those yard sales & 2nd-hand stores!
I have noticed that when I put poinsettia leaves on a pile of compost, in the past, there was less evidence of worm activity for awhile. I wonder about that.. Now if they just worked to keep mice outside!