There's 0 real economists who hold anything close to these views. What a stupid take. Before you downvote, I ask that you find a single source that contradicts my claim. Since all liberal economics is like that, it should be easy, right?
Ok, and what would you do instead? How would you keep a forum up and running and able to sustain itself? To me, pointing out that things are bad and could be better is an extremely obvious observation. The interesting question is, how do you make it better?
Eh, it's not surprising that people who spend money on the upkeep of a thing will eventually also want to get revenue out of the thing. If she doesn't like it she can host her own version of reddit and pay the server fees for everyone.