Politely asking people to stop supporting industries that hurt society is one of the ways we make society better; he asked, not told.
Ironically you are doing the exact same thing, politely asking them to stop doing something you don't like.
Maybe it would've been more constructive to link to the sci-hub copy of the paper, rather than complaining?
Asking somebody to stop supporting terrible institutions isn't complaining. Maybe you could help them find the link instead of complaining that they didn't?
It was a plea not an order and I will do that every other day again.