Well, hypothetically, if wizard (and any other company) is able to charge a few random people in court and settle for large sums of money, then it really doesn't matter to them if piracy flourishes or not, doesn't it?
If anything, it seems more profitable to find well-to-do people who pirate your stuff and then sue them.![]()
Maybe WotC and White Wolf can pull off something like that. Probably the same can't be said about 3PP companies, and other companies that produce less popular tabletop rpgs.