Today's amazing discovery: There is, at large in the world, a Bad Grammar Posse to rival the enormous, vexatious subgroups of the population who say "for all intensive purposes" and "supposably." (At this point, I consider it a minor victory that my spell check does not recognize "supposably" as acceptable usage.)
In recent days, I have come across not one, not two, but five people who have used the phrase, "inferior motives" to refer to the sneaky, clandestine dealings of others.
Back into the linguistic jungle we go!