Neither does suing companies engaged in productive activity, such as Google

While I agree with you on this with regard to the relative righteousness of a domain squatter suing Google, it's worth noting that Google offers a domain squatting service. They are participating in the very activity you and I consider abhorrent (while also doing productive things, too). In fact, Google very likely makes more money from domain squatting than anyone, since they have a very strong unfair search engine advantage over spam domains from any other provider.