From what I heard, I don't understand how someone would even want to go there. It's full of... child sites, sites to buy drugs/weapons and advertisements for hitmen. I'm pretty sure you can get in trouble for going on it in the first place
Lol no. It's not forbidden at all.
The deep web was first created for the government but later was used by all kind of people. It's basically because you are given a different IP and while using the Deep Web the NSA (e.g) can't track your movements. I would actually use the Deep Web but someone can get in trouble very qucik.