*g* I guess by now they almost all do, showrunners and writers seem to be getting really media savvy these days. (Given that Chuck Kim of Heroes admitted to reading both the main NBC and the 9thWonders board, I'm pretty sure the Heroes PTB are well aware of the, er, composed reaction to this season's cliffhanger. Which they obviously deserve.)

In addition to that, incest has become pretty topical on American TV these days; cadesama and I had a conversation about that a while back, and we came to the conclusion that it is really pretty much everywhere. (Case in point is Arrested Development, which really took the joke and ran with it in almost every combination possible, but think of Veronica Mars, too.)