Certainly. For instance, in the section "Substance Abuse/Mental Health", it points out that "children who are spanked and slapped are twice as likely to develop alcohol addiction and other drug abuse". But I highly doubt that people of, say, a religious ilk who spank their children will relate to "slapping" them, and so I believe this immediately alienates this group. To them, this grouping of spanking (connotation: mild reproof) and slapping (connotation: wanton abuse) amounts to a conflation.
I believe you avoid this alienation by restricting the studies (and dialog) to the most mild forms of spanking which we all seemingly agree are harmful behaviors. It is just my opinion, but it seems best to make it clear that even these "mild" forms are damaging and win those people over.
So your next question is probably, "Why would some one see it this way?" My own experience provides an example. I grew up in a house with a religious mother and a secular father. My mother believed in spanking, my father did not. As a child, my mother occasionally spanked my siblings and me. My father appealed to reason from earliest childhood. My parenting style (and my wife's) completely reflect my father's reasoned approach, but I promise you I know how my mother would see the argument. She would immediately turn this off if you implied that her "spanking" was "slapping", period. You would have lost her, and that would be a shame.
The bottom line is that people get defensive about their ideas when they are challenged forcefully. People on this forum are showing defensiveness with my well-meaning posts, so you are possibly guilty of this too. I am not suggesting you have to agree with me, but merely consider how effective the presentation would be if tailored for that audience that is most likely to be swayed to its point.
Lastly, I cannot share a scenario from life (other than the above) where "my approach" has worked. I do not spank/slap/hit/belittle - never have - and I have always had faith this approach produces the best outcomes. I am biased, but I believe my daughter is a wonderful example of someone who is not violent, questions things objectively, and believes in the power of discussion and negotiation. My father wins, as I see it.