I'm curious, why would it be unreasonable to cite every contributor to an article you copy? They are the ones who made it, and it only seems reasonable to me to give credit where it's due.
I was just responding to this: "...am I expected to cite every contributor? That doesn't seem reasonable."
And saying how it sounds pretty reasonable to me. If you say that a Wikipedia link counts as a cite then that just makes it even more reasonable.
I had interpreted your statement above as "Oh, of course go ahead and include a link to Wikipedia - they deserve credit too - but still redundantly list out every contributor to the Wikipedia page". This is because above, I think with the "...am I expected to cite every contributor? That doesn't seem reasonable." the author had in mind enumeration, not simple reference.