Good grief. Y'know, I am against taken, too, just like I am against all those religions that are not my religion. But I don't go around wasting my time, thought and energy trying to make sure that other people can't do "taken" either, just as I don't go around opposing other people's religions.
I am on VMK a lot, and I have never once had someone continue to bug me after saying "I don't do taken" or "not into taken, sorry"
Just ignore it. I do. My kids do. You can, too.