Boycott all pro sports in which the employees don't realize the difference between "personal time" and "company time."

Furthermore, the concept of free speech applies to government restricting that speech.  It does NOT apply in the employer/employee relationship. 

First Amendment:  

<i>Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.