An activist group is protesting a company's safety practices. They decide to lawfully protest outside the building and the management instructs their security personnel to surround them until the police arrive. The protestors feel threatned by the guards and tries to disperse back to their corporate headquarters, but they could not get around the security guards. The police arrived and after their investigation, they let the protestors leave without arrest. The group decides to bring a lawsuit against the company for false imprisonment.

Question: Based on this scenario, please address whether the protestors would be successful. Be sure to explain your answer fully and provide legal content and elements in deriving at your conclusion.