Personally, I do not feel comfortable with the idea of using setter and getter functions.
Why? Using accessors is pretty much a standard way of accessing object attributes (in many OO languages, to the point that, for example, either Moose or Perl 6 will just write the accessors for you if you kindly ask) and obeying the rules of data encapsulation. Although I do own a copy of Randal's book, I don't have it at hand right away, but I can't remember having read about "inherent" dangers of using accessors. Well, at least, using accessors is much better than fiddling directly with the objects' internal data structure.
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