Recent issue with SORBS

[am.lists]

Part of what SORBS does by doing entire netblocks is intentionally
causing pain/grief for the host. It's a negative reinforcement
attitude. Punish the many for the deeds of a few, and everyone will
[hopefully] learn from it and stop doing the bad things.

In this situation, it forces providers to be stricter on their
customers (well, in therory at least).

Agree or disagree, it's an interesting approach.