There is a serious difference between taking care of a gun and sportierizing one. It is perfectly ok to clean rust off, touch up spots with some cold blue, get the cosmoline out of the stock… things like that. it really is ok and it is for the benefit of the rifle.
If you take a hack saw and cut the barrel and drill and tap the receiver and put a brand new nikon scope with a bent bolt on, that is a little bit different. Even then, you have two of them and these things are dirt cheap and there is a nearly endless supply of them, so its not really an issue even if you did modify them.
If you did the above to an '03 springfield, that would upset people a little bit more.
There is no such thing as a stupid question, only stupid people.