User blog comment:Darkcloud1111/''The Mark of Athena'' Plot Holes/@comment-4515675-20121021160447/@comment-5211526-20130303120338

@Darkcloud1111 :My sister thinks that the whole technology is a big no-no for half-bloods is only for those devices which have signals or network, like phones and computers and it won't really matter if they use gaming devices and surveillance equipment. But ya, Leo having a cell phone(though I actually don't remember this) is definately doesn't make sense.