Those are my DH's words, not mine.
DS (5 with ASD) has been obsessed with ITNG for about 3 years. He watches the DVD's and has they toys (mainly Ninky nonks which he loves to play with). I have picked up a new one for Christmas, as well as some DVD's. DH is starting to make noises that we shouldnt indulge this obsession.
I think its perfectly harmless, he enjoys it and if he doesnt have his ITNG, he doesnt really have a lot else.
What do you do? Go with it, or try to distract and get new interests.