You may wanna read my post again because I said that it's not illegal*. But if you think you're so clean on this, I don't quite get the reason for why copyright issues matter here – your copyright or not, it doesn't change anything.
I personally think it is morally wrong to help someone cheat the class. It is unfair to everyone else who does this on their own and it is unfair to the person asking, but the latter I don't mind too much if they have been "warned" about the consequences before (simply because they'll feel the consequences of their actions eventually).
I just don't think arguing what the most objective point of view is and whether or not it is morally wrong from that point of view is worth the trouble, it rarely leads to something. But in my opinion it is wrong, and apprently in many others. I'd go as far to say that cheating is generally known to be morally wrong, but, sadly, also socially accepted in some cases ("everyone's doing it at some point").
Also, I wouldn't say arguing about this is "not doing anything". Obviously we're trying to convince you that this is inacceptable behavior (in our opinion).
*) Even if it were illegal, that does not imply that it is illegal not to report it. In Germany, for example, only not reporting felonys is a criminal offense.