That is correct...Rachel's 16 or 17, and I thought Max was as well, though I can't quite recall.
Look, I do think we can salvage this arc. I actually do like chompy's idea of the digital fairies being able to help, and if it matters that much we could retcon it so that the younger girls weren't involved (on the other hand, what was done isn't really that much worse for the fact - it's still creepy and wrong, but then, Ricky is ethically compromised by his baser instincts and we're certainly not trying to write an apologia for Julian, so I don't think it's terribly out-of-character.) I don't want to just abandon it if we don't have to, it did provide some interesting development for Julian and a new character to experiment with...