Uh, Gaia was exploitable pretty much since its genesis. DN isn't really that old. "Highly" is also a word I wouldn't use to describe it. Exploitable, yes, as are a lot of sites/online games. But it's not really a huge website, ergo not much to "exploit."

I've explored a bit around the site for some years. Found a few exploits, but nothing really too serious (the most serious exploit being a simple cracking hole that I used to gain access to an admin account. interesting story, but that's a different story for a different time). I'm sure I overlooked a few things, but yeah, no exploit epidemics or anything like that.

Gaia was downright chaotic in its heyday, so yeah, ill-advised comparison.