No matter what you think of a computer language, you ought to respect its idioms for the same reason one has to know idioms in a human language—they facilitate communication, which is the true purpose of all languages, programming or otherwise.
George also explains that “a single cache miss is more expensive than many instructions, so optimizing away a few instructions is not really going to win your software any speed tests”.
LWN covers the new W3C spec for HTML subresource integrity (SRI):
SRI is designed to combat injection attacks that come through third-party content. The originating site can include cryptographic hashes of third-party script and image files, enabling the user’s browser to hash the corresponding files it receives from the third-party servers and verify that the hashes match.
Most browsers already support SRI, including Firefox, Chrome and Opera.