Also typing 18+ doesn't stop minors interacting with them
I suppose it makes them feel safer to engage with someone in a place advertised for adults than one that isn't. Granted the firmest solution to that would be not engaging in a flirtatious/erotic manner at all, but human nature's a bitch. Just look at how the forums were screeching like banshees because it took them a week to get their 2B ass.