What do these hacks all do?

Can someone explain why someone would want glass walls? I mean you can't shoot through them can you? Someone should make a thread on what each hack is.. like X Y Z hack or w.e, or ghostmode, or opk, telekill etc. etc. I know what most are but others I'm not sure and I bet there are a lot of noob users who don't know either lol.. It would save everyone the trouble of answering noob questions in the hack threads themselves don't ya think?

Yea that's true.. but sometimes its hard to tell if the hack is working, or what exactly it does lol like whats the dif. between virtual jump, no gravity, super jump? I don't know, thought maybe I had a good idea haha.. Ppl always ask me noob questions and it's like are you serious?