Fairy Creek is a creek, which is fed by a watershed. But the word has also taken on a new, distinct meaning, as a label for this ancient-forest-defending movement emerging in the same general area. When it is used in this sense, it is not an attempt at misinformation; “Fairy Creek” has become a convenient phrase to refer to the the blockade.
Yes, there are cutblocks being blockaded that are not precisely within the bounds of the Fairy Creek watershed. The fact that the movement referred to as “Fairy Creek” is not exactly geographically congruent with the boundaries of the watershed that feeds into Fairy Creek seems rather irrelevant. Opponents of the movement may nitpick about this phrase in an attempt to create negative publicity, but such attempts do not display much depth of understanding.