I do not agree completely with "anyone with minimal knowledge and little effort". That is the true with some obfuscators, basically because they suck. However, I dont think that we should put them all in the same bag. Consider this example for instance: http://jsfiddle.net/JScrambler/5ujp3/ It has anti-tampering and other stuff in it. I REALLY don't think it requires minimal knowledge and little effort to hack it.