In general, "X contains hazardous toxin Y" claims seem to almost always be overblown. For some reason people get really up in arms about the possibility of such a thing, even when the practical danger is close to zero, and these same people often have no problem with doing provably dangerous things like eating unhealthy foods, not getting any exercise, smoking, driving without a seatbelt, etc.
Not that we shouldn't be researching such things because sometimes real dangers do exist, but yeah. Had to rant.
