I would include in the class action any website that linked to the map.
I suppose you can try, but that gets you 100,000 more respondent lawyers, and no more plaintiff lawyers.
May not be a good strategy, esp since your take is limited to some estimation of the damages.
If your goal is money, you have to have a good chance of winning to get a settlement. If your goal is driving the guilty party out of business, you have to have a good chance of winning so that he spends a lot on lawyers, and his legal costs are mostly concentrated on him.
Maybe the court should make the paper put in a very solid alarm system for everyone on that map as part of any settlement/litigation for the protection of those poor people..