Let me start by stating that everyone has their own individual set of values, and we do understand that. Our goal with the policy going forward is not necessarily to single out any group of fans as outright reprehensible people for liking video games, particularly not games that are released legally and rated by the ESRB. Further, there are valid arguments to consider in terms of why other morally dubious content seemingly gets a pass.
Having said that, though, I want to also state that the consensus on the moderation team here is that -- fair or not -- we really have next to no desire to have games that feature sexual content starring characters that either are or appear to be underrage given a platform here. We have even less desire (i.e. none) to actually have to read and moderate these threads. As such, these threads will often go unmoderated.
This is a problem. It's a problem for everyone. It's a problem for fans of the game that actually want to talk about the game and aren't necessarily there just to oogle questionable artwork. It's a problem when imagery gets posted that goes beyond what we consider in good taste and we aren't there to react. It's a problem for us in that we get complaints from people on either side of the issue and feel a sense of responsibility to react, but don't really know what to do. Do we go in to promote civility in the conversation, or do we go in to crack down on what we deem to be inappropriate sexual content that features characters that appear to be minors? I think by and large, several (perhaps most) just opt out of doing anything because we simply want no part of the conversation. Frankly, the less I personally know about Monster Monpiece or Criminal Girls, the better.
But that's not appropriate as an official policy. It's confusing for you, and it's even confusing for us. So the consensus we've reached in regards to these games that prominently feature underage girl fan-service is to simply not give them a platform here. That's not to say that we all out and out condemn the very existence of these products and the fans that would play and want to talk about them. But we just honestly feel that there is no place for it here.
As always, if you have questions about a particular game, or a facet of the conversation that you are unclear of, you are more than welcome to PM moderation with your comments and concerns.
That, in a nutshell, is what the moderation team feels towards this subject in general. As always, with any moderation questions (about anything), send a PM (seriously).