I think it would be a mistake to discount just how smart a dragon really is.
While it is true they knew nothing of the matrix before they awoke. Once they awoke, I bet they (well, most) made a huge effort to get a grasp on the technology of the day. And given their vast intelligence, they would grasp the fundamentals of the matrix much better then most deckers or programmers.
We know that at least a few dragons use the matrix, we just don't know how much.
You are completely right but the issue remains that Moore's Law affects the capabilities of AIs. Some already possess the traits that make more intelligent than most intelligent metahuman and within a few months after will be more intelligent an entire civilization of metahumans.
Where does the benchmark lie for the dracoforms? They ultimately up next on the chopping block of being surpassed. The dragons, even most of the Greats seem to unaware of this happening.
We got a taste of this when Dues was preparing to go full Skynet on the world Mirage got involved. I can only think of this getting easier as more powerful AIs start showing up at a exponentially faster rate which will either result in another Crash, or the Greats being thrown from their perch of the most feared beings out there.
As for dragon pornz in the Matrix, I'm sure it exists in shadowrun as it does today and has made it's way into BTL chips. That's what the internet is for.