Some of the best Star Trek work over the last decade has been created by fans, not the official CBS and Paramount guardians of the Roddenberry Galaxy. Both in print with various fan fiction books (including sanctioned collections) and, of note lately, full scale production films. Typically distributed on the web but also available on disc, these films might have started as garage and basement productions, but have come a long way very quickly. 
Star Trek Continues explores the final two years of The Original Series five year mission, and does so almost better than Shatner’s crew did. Star Trek Renegades (and their first film “Of Gods and Men) employ veteran Trek actors and present with dang good special effects and story.

Until now, CBS/Paramount has looked the other way, publicly stating that as long as the productions do not turn a profit, all is well.  

But no more. With crowdsourcing from Indiegogo and Kickstarter generating millions for new productions, and professional actors, f/x companies and music writers joining fan productions, the first shot has been fired. Axanar, a prequel set 21 years before the Original Series, has been sued for infringement, just months after face to face meetings where all was declared to be okay. With professionals joining these productions, I suspect that crowdsourced films based on big studio works are in trouble.  

The question is now asked,  when can professionals in the movie and TV be fans of a show?  Never?  

And with the ever increasing level of sophisticated equipment available to the average person, even teens can put together a broadcast worthy short film at little expense.  The YouTube generation might be in for a fight from Big Hollywood.