For years, major American tech companies have complained about the threat of intellectual property theft. The U.S. government has projected that Chinese companies flouting IP protections costs the American economy as much as $600 billion every year. But this problem of companies ignoring patents and other IP protections isn’t just a cross-border issue — there’s a similar issue right here in the U.S. If major tech companies seem less concerned about IP violations closer to home, that might be because in these cases they’re often the perpetrators, not the victims.