I don't really the threat from Scientology as very significant or important in the scheme of things, compared to other social issues the problem of the church seems rather benign, and that there are probably more worthwhile things to protest over. Maybe this is what attracts protestors, that there is a possibility of stopping a potentially larger problem before it occurs (Scientology gaining ground in the mainstream?). In any case, perhaps some of these protestors should consider the threat of being unemployed, which can lead to even graver situations (such as being poor) and put their protest off a while to get some jobs.
Remember kids, wasting time is (among) the worst crimes one can commit.