Is there a "wrong way" to play Dungeons & Dragons? No, there is not. Not really. D&D is a game, which (as a term) is an important distinction from either "play" or "sport." Man, I wish I still had my textbook from phycho-physical development (that was what my high school called "P.E. class"). Well, whatever...if I remember correctly, the main distinction between game and sport is the presence of a finite time limit (which D&D does not have) and the distinction between game and play is the presence of rules/structure.
D&D does have a rule set that provides it with structure, but it is a very loose rule set, explicitly stating that certain aspects of play will need to be improvised or refereed and that none of the rules are sacrosanct or incapable of change, should the DM choose otherwise.
Does this mean D&D is really just "play?" No...even if the DM chucked ALL the rules out the window, it would still have an inherent structure that "play" lacks, namely the presence of a "DM" in opposition to "players."
Right? Okay, yeah, let's just say it is so for the moment. SO...being a game with explicit text allowing changes at a whim, I suppose the only way possible to play D&D in a "wrong way" is to play in a fashion that doesn't jibe with the rules/structure as laid down by the DM. If the DM says everyone's going to roll D30s instead of D20s for attack rolls, than not doing so (playing the contrarian) would be playing wrong...with some predictably unhappy consequences for the player doing so.
All right, so, having said THAT...I do think the D&D game as written acts as an excellent vehicle for some styles of role-playing, and is less than adequate for certain other styles.
Oh, man...I really want to say "FAR less than adequate" but I know I'm already going to be ruffling feathers with this whole line of discourse.
In fact, screw this...I got two hours of sleep last night and it has been one exceptionally long day. The baby's been sick the last couple days, and this is my first real break in more than 24 hours. I'm going to veg out and watch some Monday Night Football. Or fall asleep in front of the TV. Or a little bit of both...zzzzzz...