I guess it depends how you talk about it. Ninjutsu is nothing to be ashamed of. In my town we are very repressed by religous zealouts. I have to be touchy with the way I explain it but I never hide it.
I just get a kick of when ever the hicks here say, you wanna try some of that hu fluk chi hu on me? Ignorance is funny.
Unfortunatly though Hollywood has both been a best friend and worst enemy to the art. No doubts it helped birng popularity, but s screwed up image to the art itself. I have people wanting me to show them how to jump off a friggin 2 story building, and they are serious!! I tell them to use the stairs.