Losing battle for much of it though. Language morphs and
   changes. The way you and I write and speak might make past
   generations cringe with equal irritation. Still, good to hold
   people to some standards. I tend to use "based off of" rather
   than "based on". It carries a "bounce" sense rather than a
   'stable concrete footing" sense. Think of photons reflecting off
   of a surface versus considering the surface to "have a color".
   That's how my mind sees things. I don't know about others. Of
   course "base" *should* have a sense of solid footing but I
   suspect the language shift is due to the similarity of the sound
   of "based" and "bounced" honestly.   Also consider the phrase
   "bouncing ideas off of you" and how there has been a shift in
   considering "facts" as "opinions". There's some sort of
   connection there. "based off of" abstracts the results slightly
   from the study, as if an opinion that could be potentially
   incorrect, rather than something set in a concrete base. I dunno
   - just thinking aloud :)