i think there is a difference when you opt in to curation knowing what to expect.  like forums back in the day, you go to a reptile forum you expect pictures of lizards but not cats.  nothing against cats,  but a cat forum probably wouldn't expect lizards there either...  and Moderators clean up the porn spam and the occasional political post that someone on a reptile forum might not care to see either.  it's opt in curation,  which is self censorship.  you're willing to risk missing a nice cat pic,  but because you chose this particular reptile forum,  you're ok with it. see how some might look at it?