very good point actually often long time impostors regardless of their motives intend to remain in their assumed role at least until somebody reveals the ruse those who assume some other role temporarily for fraud like wilhelm voigt or for the hoax of exposure like joey skaggs or for investigative journalism are bit more problematic cases in effect they are temporary impostors but the difference is hard to define what do you think could it be useful to include a section about using sort of an imposture for some specific purpose