Your bread won't go poisonous from that. But its still not so nice to find a piece of poppy wood in the bread
There could be a problem if you would soak poppy seeds for too long in cool water, so they would start to sprout. Just slightly sprouted seeds can give nasty migreine for someone who is sensitive to that. Checked on myself, so now I'm boiling them instead of just soaking.. still love the poppyseed cake
Anyway, varietes sound very nice, you have reminded me my childhood and all those poppy heads in autumn drying, kids were eating seeds straight from that.. So nice.