> So the proper response to the question above is to immediately ask why the
person didn't "just" use free software and/or a non-DRM'd file, instead of
imposing unjust restrictions and hassles on other people.
This is a confrontational response, not particularly likely to be productive,
and there might actually be an answer even if it's not a good one. Besides,
you can't change the past. Your goal should be to convince whoever is
responsible to not do it again in the future, not to tell them that they
should feel guilty.
In fact, I would argue that you should make sure that you don't accuse anyone
specific of responsibility. If there is reasonable doubt that you know who is
responsible for something bad, then that person may reflect on that and
decide to change their behavior in the future so that they don't get caught
out next time. But if you specifically say something about them, like "you
were wrong to do X", then they are more likely to be defensive, come up with
justifications, and resist change. Basically, it hardens their heart.
So, to clarify, I think you should criticize the action very harshly, but
never accuse a specific person of performing that action. You should speak as
if the person you are talking to would never do such a thing, and you have no
idea who did it. Heck, maybe even accusing Adobe Reader of doing that by
default, or suggesting that some unnamed person must have lied to them.
Pretty much anything to avoid making them, or any other specific named
individual, into an enemy.