Historically, pinball is not a family amusement. It has been and still is loaded with sexual innuendos (wnbjm) and images. Yet in comparison to modern video games (GTA and the like), it is really, really tame.
Robin, I understand if you want to censor the off-topic random boob pics and whatnot, I agree that doesn't make sense on a pinball forum. But you cannot deny the seedy history associated with pinball. I think you're at a clash of demographics unfortunately, like trying to make a PG rated website to discuss R rated movies. The seedier side comes with the territory, as not everyone that is interested in pinball cares about being family-oriented.
I don't see how you could possibly keep a pinball website mostly family appropriate without a lot of moderation unfortunately. I would like to see pinball and this website be a more inviting place though, from the outside in I can imagine it doesn't always look inviting. But again, its your website, you can do whatever you please with it. I love this place, and I enjoy helping people with tech questions here. But I also enjoy the adult discussions here, lots of varying opinions and colorful personalities with the commonality of love for pinball. It would stink to come here and not be able to engage in those conversations. Just my thoughts.