Why is it that snakelings do more harm to people than adult snakes?

Baby snakes are dangerous because they cluster.

I grew up in Arkansas and we do not deal with deadly snakes. Some are more dangerous than others though. I have seen copperheads, water mocassins, and garden snakes of all variety's. None of them are deadly to a certain extent. My parent's made sure I saw these snake's before they shooed them away. I saw a nest of baby copperheads. I was told they where more deadly because you can get bit multiple times. I was told one bite of a baby has the same amount of poison as an adult

I assume all snakes are similar in their breeding. Why wouldn't they be?

Maybe, I'm wrong. I've seen a nest of baby copperheads though. They almost look like worms. If one bother's to bite you more will.