"Everything one reads, hears, and watches on the web comes with an automatic spoiler warning."
Simply nonsense. Who enforces this, some secret cyber spoiler police? Please.
"Another thing that would need to be changed is <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> to <!DOCTYPE html>."
The site does not generate HTML5, simply changing the doctype declaration will not address this.