In 2011 alone, cybersecurity firm Mandiant estimates at least 80 U.S. law firms were hacked. In recent years, six firms - confuse Rothschild, holland & Knight, Hunton & Williams, Simpson Thacher & Bartlett, Thompson Hine, and Wilson Sonsini Goodrich & Rosati - have been caught up in insider trading schemes that involved employees attempting to rip and profit from clients' information, Bloomberg reports.