Ever heard of adequate response? No? Well, in this case it would be writing a review about the app being nagware. In general adequate responses are good because they prevent situations from escalating into hostilities. Yours also has a sideffect of making it impossible for any buyer in the app store to make an informed decision, and therefore makes it hard for good apps to stand out on the merit. It ends up giving a boost to the actual crappy apps because now, with your generous help, all apps have bad reviews - both truly bad apps and the ones that had the gall to ask for your opinion.