This is ridiculous.
He didn't say Dance can't interact with Rock, he said if you make a Rock song you can't call it Dance.
And he said if you would add Rock elements into a Dance song, you can't call it Dance anymore as it isn't Dance anymore.
Read his post again closely, Zypher.
Dance is a strict genre and cannot interact with rock in anykind of way because then it would not be dance.
He apparently DID say dance can't interact with rock. Saying you can't do this is moronic, because adding rock elements to a dance song doesn't make it something else, it can still be a dance song. Please don't reply saying that would be Dance-Rock-Ultra-Techno-Pop or something retarded like that.
I can write a symphony, add a jazz guitar and drum set parts to it, and still call it a symphony. It doesn't make it Symphonic-Jazz.
You have very elitist views on music, but I would suppose that's because you're "in the music industry". Furthermore, the only good thing about genres is it helps organize things just a tiny bit more. Other than that, they're completely useless. Why everyone is getting so bothered here about it is beyond me.
This topic will be split soon, and will then be found in Intelligent Debate.