Upload & Sell: On
I think the OP knows how he feels (and maybe they are mixed feelings).
I think the OP is asking (trying not to tip his hand which way he feels) what rationale exists for feeling the way he does.
I think the OP (as many others) are in conflict between what they genuinely feel ... vs. ... what they "think" they aren't supposed to feel. It is a hard pill to swallow that people take something from you, yet seemingly (fallacy) it is okay to do so as so many advocate "be grateful" @ credit ... based on things they've been told or heard. In that regard, their gut tells them one thing, but their brain has been filled with something that conflicts their natural and innate gut feeling on the matter.
Then, most people want to be reasonable ... so they somehow have been led to believe that they are making waves over something they have no right to do so ... oooh, oooh someone gave credit ... when in fact, they have every right to do so. The simple reality is that they have been the victim of a wrong action, and their gut feeling typically knows that. Yet, with so many people saying its okay (fallacy) to take and use other people's work without their permission (errantly referring to "fair use" just because no "direct" monetary gain was evident), it is confusing to them as to whether or not their feelings of being wronged are "valid".
Yes, your/my/our feelings are valid ... whether you appreciate the action or don't appreciate the action ... and there is legal basis for the fact that the work was taken without permission that substantiates when your feelings are that you have been wronged.
Simple ... someone took something from you that you didn't give them permission to take. Each one of us may have a different feeling ... or degree of feeling ... to such an event. But, when we feel as though we have been wronged, we shouldn't also be bullied into feeling like we are the "bad guy" for wanting it to be made right.
I'm not advocating that everyone should take the matter to the Supreme Court ... but I am advocating that when you have been wronged, it is reasonable for you to feel wronged and the legal system substantiates that a wrong was committed. How one proceeds to restore from that is highly variable in the myriad of ways it can be approached, but I find it vastly important that when someone has been victimized and wronged, they not be further disrespected by insinuating that they don't have the right to feel "pissed" ... and ought to be "grateful". If they are genuinely grateful, so be it. But for those that are genuinely grateful ... I don't think they come around here asking how they should feel.