all i can say is thank you for saving all those live critters.
i keep Piranha as well, and they are illegal in many southern states due to people getting bored of their fish and dumping them in a pond.
they thrive in warmer southern waters and could devastate the local community fish (dont normally at all but they can) so they are made illegal in many states.
im more than sure you finding all these abandoned balls is form people getting bored or neglect and it is just sad.
people think, oh thats so cool, or, i would love to watch it kill something, and then when the thrill is gone (if they gets thrills off that) they get bored.
its a shame, and i cant say for certain that all the snakes you found are in this category, but why else would you be finding all these balls?
anyways, good man, thanks for finding them and giving them much needed care.
what will you do with them?
will you find a permanent home, or do you keep them?