I'll preface my post by saying this: I don't fap to little girls. 2D, 3D, 4D, or whatever. I just don't like them.
I see the topic of lolis on heyuri as just another thing we can get lolz out of. Just like we might do with raep, anime, yuri or any other topic. Obviously some are more serious about it than others , but they behave well and don't shit up the place. For example, take the little alice thread. Some posters on that thread actually like little girls, some others didn't, but we were all there for shits and giggles, and shits and giggles were had
Secondly, i think it's hard to argue moralfagging does any good. Regardless of what views are being defended, it always ends up with pointless arguing (not discussion, arguing) that kills the thread. People can discuss whatever they want but entering with a holier than thou approach kills the fun for everyone. Plus, the topic isn't as frequent as other posts in this thread might lead one to believe. Heyuri is far from being a hotbed of cp or loli porn
That's not to say that child porn is intrinsic to heyuri's culture but rather, that the jokes about, references to, or discussion of, lolis (2D or otherwise) is a subset of a culture based on the principle of just laying back and having lolz together. If you don't find that funny or interesting then ignore it and make/post on threads about things that you actually like, without letting other people's enjoyment ruin your day