Not only is it not allowed on SoM, but it is also not allowed on the internet and is illegal.
Please remember this when using someone else's information either as an addition to yours or as a fully used article. All you need to do is simply add the website or book where you obtained the information from, below are two examples.
If you have problems with citations or need help in citing something, an easy website to use is easybib.com. It auto-cites for most websites on the internet and can help you out in citing a book you only know the title of.
"by submitting your contribution to spellsofmagic.com, you:
"Canadian copyright law is governed by the Copyright Act, which protects original literary, artistic, musical and dramatic works. A partial list of works which are entitled to copyright protection in Canada includes: books, newspapers, dictionaries, manuals, catalogues, magazines, pamphlets, computer software, paintings, drawings, design trade-marks, sculptures, architectural works, engravings, dramatic works, photographs, films, videos, scripts, maps, lyrics and musical works."
Kerr, Philip B. "Copyright Law in Canada."Copyright Law in Canada . Web. 12 Sept. 2011. http://users.trytel.com/~pbkerr/copyright.html.