Not by the same people, though. If he damaged ten people, he might owe damages to each of those ten people. That doesn't sound like a problem to me.
> Second, fining someone a billion dollars is just ludicrous.
It seems like your argument is that the sum is simply too large, and that the specifics of the case are irrelevant.
This seems dangerous to me. If someone does actually cause that amount of damage, why should they not be civilly liable? Surely it depends on the specifics of the case to determine if they did cause that much damage or not?
Otherwise, does everyone just get to cause as much damage as they like but have a cap on what they are held responsible for? That doesn't seem right to me. If someone wants to get involved in a course of conduct which can cause terrible damages to others, then they should also be responsible for that.