NotMeNotYou said:
Injecting code or other files into it, I should clarify that.

Edit: This has been clarified.

How the he'll does that actually work? I remember there was a handful of posts a year or two ago that had entire site rips inside them, most of it DNP content. But how does that even work... and how do you recognize when that occurs? I remember that I was totally confused, I'd DLed a post just to see what everyone was yelling about and ended up deleting it from my HD cuz I couldn't figure it out...