> standards are there for a reason > you don't just ignore them because you don't agree with them

People always ignore the bits of the standards they don't agree with; taking an entirely dickish and non-random example e.g.

<img src="http://secure.gravatar.com/avatar/df0e70f6e810442b86d701afcb...

https://html.spec.whatwg.org/multipage/ says "4.8.4.1.1 Except where otherwise specified, the alt attribute must be specified and its value must not be empty"

Or having 4 <section> but only 3 </section>.