Hardly the need. Of the organizations who propose a "theocracy" that I'm familiar with, all propose a smaller, less intrusive government than the one we have today - and at least one advocates a combined taxation rate (federal, state, local, etc etc etc) of no more than nine percent (that's 9.0%, or 0.09) of an individual's gross income. Very, very hard to run a coercive, totalitarian police state on roughly 1/4 the size of our current government.
And on that point, with a tax rate capped at 9% a theocratic government would functionally be far more libertarian in laws, scope, and size than naysayers would like to admit. In short, it could only work as a government of self-government. Even Steve Forbes' "flat tax" campaign proposal was higher than 9%, and no one accused his Presidential aspirations of being diabolically totalitarian.
Since the majority of the population currently doesn't support a theocracy of any variety, as evident by their voting patterns, consumption of porn, and divorce rates, I don't think you have anything to worry about.
The "theocracy" is actually taking place under humanists.