A lot of the this so-called mangling is really just the same old usage gripes from nitpickers. Now that that gripe is off my chest: my nominations.
On a 20/20 segment one of the reporters said this of a surly crowd: They started hurling racial epitaphs at each other.
And one of my all time favorites: at the Anita Hill hearings (anybody remember Anita Hill?), one of the senior senators (was it Orin Hatch?) spoke about the aligations and the aligaTORS.
By the by, Shits Creek would not be the correct way to refer to a number of said objects the same way lunches boxes would not be correct. Nouns used as adjectives take the singular form. Winter coat. Field day.