:If you want to keep the quote, you have to keep it verbatum. It's not a question of what or what isn't appropriate or what information is provided. It's a matter of what he said. He used the word "fucking" to emphasize how strongly he felt about it. Neither your or anyone has the authority to paraphrase his thoughts or words. So the question becomes: Is the word "fucking" vulgar? I think not judging by the number of article titles in Wikipedia with the word "fucking." For example, there's Fucking (song), Fucking Machines, The Fucking Champs, Star Fucking Hipsters, Fucking Smilers, Fucking Boyfriend, Shopping and Fucking, Fucking A, Fucking Hell, and Toodle Fucking-Oo, to name but a few uses of the word, and these examples are in titles only. Imagine how many times the word is used in article text.. 
 :Nope the word "fucking" remains in the David Foster Wallace article because he, the subject of the article, chose that word.