I have donated to Axanar, among other Trek fanfilms. The truth is CBS has the legal high ground.
That said, as recently as August 2015 CBS had given Axanar a go-ahead. The timing of this is a dick move.
Another respondant on an Axanar page thread gave online contact for CBS for us to complain. Change-dot-org has a petition. Well and good, but electronic messages are easy to ignore (i.e. As soon as "Axanar" is read, "delete" is clicked). The Hashtag means nothing.
If you really want to complain to CBS, a phone call is better--this requires your time and their personal attention.
Q. How can I speak to Audience Services about a CBS program?
A. You may telephone us at 212-975-3247 between the hours of 10AM and 11:30AM ET....or 2PM and 3:30PM ET Monday through Friday.
A good old fashioned letter is better. Now YOU spent time AND money, and dealing with thousands of envelopes and letters takes more CBS resources than simply deleting an email.
CBS AUDIENCE SERVICES
524 West 57 Street
New York, NY 10019
In short, bring it on like it's 1968 and Bjo Trimble was lighting a fire under your ass.
Bear in mind a lot of us do fanfilm work, and that includes FxHome (Simon's new tutorial, for example, is potentially copyright infringement, except a tutorial gives FxHome a "Fair Use" claim). The question is, is CBS treating this as a one-off, or a test case to go after other high-profile fan productions like Star Trek Continues or Star Trek New Voyages?
If Axanar is shut down and the upcoming Star Trek Beyond doesn't take a massive box office drop, then CBS will know the fans are powerless. This might encourage Disney to go after Star Wars fanfilm or the BBC to go after Doctor Who fanfilms.
And, legally, they win. But why hurt non-profit work done by fans?