Feinberg drew attention with how-to story about the "creepiest things you can do on Facebook, such as tagging yourself in someone else’s engagement photo and requesting a relationship status.

"[5] In August 2015, Feinberg broke news of 19 Kids and Counting participant and conservative Christian activist Josh Duggar's use of Ashley Madison, an online dating service marketed to married people seeking extramarital affairs.

[1] Writing in the Columbia Journalism Review, Matthew Kassel said, "Feinberg's highly ironized persona gives her the air of a digital-era Andy Kaufman.

[16] In October 2019, Feinberg uncovered an anonymous Twitter account that Republican senator Mitt Romney had used to, among other political comments, post criticism of Donald Trump.

[17] In December 2019, Feinberg investigated editors on the English Wikipedia who made edits that appeared to have been written either by Pete Buttigieg or by an individual with intimate knowledge of his early life, family, education, friends, and career.