I am a big fan of dry beans because I think they taste better. As far as I know only red beans, especially kidney beans, have the toxin in any amount which requires concern, however, if you and your family aren't used to eating beans, the small amount, not boiled away, may bother your tummies. Not dumping the cook water is also, in my very humble opinion, how beans punch your ticket to ride the fart train.
Me, I use the quick soak method which allowed me to do as I please with my beans. I suppose this could happen overnight, but I have never tried it - so you do need about two hours in which you will be near the beans, or able to return. I sort and wash the beans in my colander then I add tons of water in a pot and bring the beans and the water to a boil together. I add herbs and flavorings here, but NEVER salt or tomatoes. Learned that the real hard way. Get it? Hard beans? No? No one else has screwed this up and had a hungry husband glaring them over some rock-hard beans? Anyway. Beans boil for 10 minutes - toxin solved. Then soak for up to two hours. Then I dump that water and, yes, any seasoning, and now, you can do whatevertheheckyouwant to those beans.
Yay, beans!
Â
As for the batch you have... maybe you can eat them and see if they're OK? I don't think the toxin id deadly, just very painful for the guts. Nothing I'd wish on anyone, but if it has to be someone, better an adult I suppose.
Â
Edited to clarify/ you boil the beans for 10 minutes, then you shut the heat and cover the beans and leave them there in the hot water to soak. Yum.