I think that magic in general could be considered "taboo" or "forbidden" by much of society, as (at least here in the US) much of our society follow Christianity. In the Pagan community, on the other hand, magic is welcomed and accepted. It is either malevolent or benevolent depending on the intent of the caster, so I suppose to some in our community one or the other could be considered "taboo" depending in their individual views. Perhaps you could be more specific as to what it is you are looking for?
Blessed Be and With Respect,