On the ease of recovering sensitive information

Generally one would not trust the mere blotting out of information to suffice for its nonexistence. If the size of the missing information, the type, the context, the environment can all be used to help in the preservation of that information (like a fingerprint or some distillation of what that information is), then one must obliterate not obfuscate to secure.

Consider the simple, current example in which sensitive government information could be easily “guessed at” (all such guesses are in red, sometimes with accompanying “alignment” text).