I researched this last time the topic came up on HN. Based on some investigation in Google Books, what books actually do when quoting text containing [sic] is u

I researched this last time the topic came up on HN. Based on some investigation in Google Books, what books actually do when quoting text containing [sic] is use a footnote: "blah blah [sic] blah"¹ ¹[sic] in original. (And keep in mind that [sic] is not shorthand for "ha ha you're stupid" even though that's how it usually gets used on the Internet.)