Sexually explicit content isn't allowed, regardless of the age requirements. It's because 17 year olds can use the app. If it were 18+, it seems like the rules on sexual content would be looser (pun not intended ?).
Half naked isn't full naked. The game's age requirement got upped to 17+ because of things like the avis (it used to be 13+).
Considering every silence I make I double check with ToU, and Silencing policy, yes. I warn when I can, and sparingly, but if the situation calls for it I silence. I don't believe I've ever silenced unjustly. I have silenced friends before, if you ask for bias next. I've told friends to refrain from talking to me like they do in PMs as public channels aren't the same, and while it's a shame that I'd have to punish friends, it's the job. At the end of the day, if you break ToU, I silence. If I don't do it correctly, then It's up to ATA if they want to keep me or not. You don't really have much room for errors when you're a mod, if you're abusing power or showing bias, the punishment will be swift. People might not realize it, but we have to watch 2 channels, walls, statuses, and forums. It's a heavy workload. That's not counting the questions that people want to ask, and since we're regular players as well, we still like to actually play the game.