"Tortious interference with contract rights can occur where the tortfeasor convinces a party to breach the contract against the plaintiff" (http://en.wikipedia.

"Tortious interference with contract rights can occur where the tortfeasor convinces a party to breach the contract against the plaintiff" (http://en.wikipedia.org/wiki/Tortious_interference http://en.wikipedia.org/wiki/Tortious_interference). In this case, the employer would be the tortfeasor, who convinces the employee ("a party") to breach their contract (the employee's agreement to abide by Facebook's acceptable use policy in exchange for access to Facebook), and Facebook would be the plaintiff.