Well, if they didn't get permission from Nexon/whoever else's involved with Vindictus, that would be a definite reason the Nexus wouldn't allow it. They don't allow ripped content, not without permission from the rights holders. I don't know if that's the case that they do not have permission, but assume so.
Eh. I'd happily download mods from there. As long as it's not like "run this included executable" stuff. Just non-executable stuff, I don't see the harm in it.
What in the world is Loverslab? It sounds frightening.
If I recall correctly from my last visit there, it was a place filled to the brim with all of these sex mods for Oblivion (like pregnancy and such, also going as far as one with wild wolves). Supposedly most of them were initially made by Japanese people and the lot of them were translating it for English or something.
It's a bit funny, since there's a tentacle rape mod on Oblivion Nexus that's been around for a while and even some of the tamer Lovers mods (in comparison) aren't allowed on there.
If I had to summarize Dawnguard in two words, it would be this: more Skyrim. ~Kotaku journalist failing to understand DLC
Exactly what Destructors said, it is a place where you can find the mods other sites wont host. There also point you to the direction of a lot of mods made by eastern asia modders that you wouldnt normally have access to or even know about otherwise. I use adblock so I dont even notice the porn ads but as far as safe to download it is but just how safe is any place to download. As with anything you download from anywhere always use common sense and be cautious.
Also not just about downloading viruses but downloading that can mess with your game. I DLed an armor mod from there and noticed it had some extra files in it so I didnt use those, it turned out the mod author which was from eastern asia accidentally left some files in there that would change the text of books and signs to a different language. So what I'm trying to say is dont just download anything from anywhere blindly and always inspect it to make sure it wont screw with your game.
Xbox Live GamerTag: PannicC "In the Country of the Blind, the One-Eyed Man is King" H.G. Wells
I don't really use the Nexus forums. Its really more about the idea of having a nice, legit place to download with a minimized risk of getting viruses than it is about being in another online community.
Of course I scan after every download anyways, but its still always nice to have some feedback first.