One linguistic fad I find especially ugly is the use of the present tense when it's the past that's being spoken of. For example, "So now he buys . . . " instead of "so then he bought . . ." Sportscasters do this a lot, but I hear talking heads on political shows doing it too.
I don't know how much of a fad it is, at least from a literary standpoint. Henry Fielding made fun of the extraordinary use of the present tense in Samuel Richardson's novel Pamela (1740), a book in which the lead character, a servant girl, seems always to be narrating her adventures (such as those with her amorous master) in letters even as she's experiencing them. In Shamela, Fielding's Pamela satire of 1741, Shamela writes: "Mrs. Jervis and I are just in Bed, and the Door unlocked; if my Master should come -- Odsbobs! I hear him just coming in at the Door. You see I write in the present Tense, as Parson Williams says. Well, he is in Bed between us, we both shamming a Sleep, he steals his Hand into my Bosom, which I, as if in my Sleep, press close to me with mine, and then pretend to awake." And so on.