Yes, "preventive" is fine for me, haha
Your mentioning the use of "do" nowadays is a point well taken. How about "goes" instead of "says"? As in, "he goes 'how do you like that?'"
And the use of the past tense of "write" ("wrote") instead of the past participle "written" (as well as other irregular verbs)? My doctor, who is about 20 years younger than I am and Brown educated, said something like "he has wrote". I had to bite my lip from saying anything, lol. I also once emailed a journalist about his usage of something similar, and he actually (and obliviously) defended what he wrote as correct.
Don't get me started on "lay" vs. "lie" either. Or "submit" in mixed martial arts ("John submitted him").
Sorry, I can go on and on, as I expect you can.