My Mom saw a sultry and subtle evil behind passive-voice sentences. When she was still alive, I didn’t quite understand the rationale for this … it’s just a construct of the English language, which like any other, might make sense in some situations. With each year I see come and go, I get a little bit more wise to the true nature of her complaint. Verbs should be connected to subjects. Oops, uh, pardon me … writers should connect verbs to their subjects. The “who’s doing it” should, at the very least, exist as a common and successfully-communicated idea, between writer and reader, speaker and listener … whether or not it’s stated specifically, it should be spec’d out in some way. To fall short of that goal, is to deceive.
Perhaps the most blatant failure on this count is “Mistakes were made,” so common it now rates a Wikipedia article, tracing usage beyond Nixon’s henchpersons to Ulysses S. Grant, who tossed it into his 1876 State of the Union message though Grant did finish off the phrase with “I admit it.”