Gnorcing is a temporary ban, lasting one or two weeks. It is impossible to get gems while being gnorced and impossible to post. However, you can view some of the forums. A mod can gnorc users from 2 hours to 2 days. Sometimes users are Gnorc'd (yes, the word has its own verb) so they can later be eternally banned. Some users ask to be be Gnorc'd so they can do their exams well and whatnot.