Irritated to find out employees of a certain grocery store have been illegally downloading and sharing one of his movies, film director Casey Tebo set out to take matters into his own hands and teach movie pirates a lesson they won’t forget. The filmmaker, who scooped an Emmy award for his work on ESPN’s Dream On: The Stories of Boston’s Strongest, raised $500,000 from close friends and acquaintances to direct a horror movie called Happy Birthday.