First of all, this is truly an exercise in semantics. Is someone an 'athlete' if she is in high school sports? What about a rec soccer team? What about pick up soccer? I haven't played competitively in years, does that mean I am not one?
Or take business, for example. Which persons are "businesspersons"? The CEO? What if the only thing she does is wine and dine clients? What about the President who relies on the CFO for actual understanding of financial performance and the COO to execute her business 'ideas'?
In the same way that all of these people are in some way 'businesspersons', I think that in the realm of science--especially given the sophistication and diversity of the field today--it can only be for the sake of vanity to decide who is "not" a scientist.