I give talks at development conferences where I mostly blow people's minds by showing how easy it is to pull information out of binaries (both statically and dynamically); there are always tons of questions from the audience afterwards about "but we do X? doesn't that make us safe?", so I have to sit there shooting down a ton of silly ways of obfuscating their data, showing how each one could be defeated, but it "clicks" for everyone that there is no safe way to do this.