When registering to this wiki, at least a nickname, a password and a valid email address is required. This is mainly to prevent spam in the wiki. Beside this, you do not have to give any personal information.
Without of permission, I will not give away any of your personal information to any third party and I will not use it for advertisement or commercial purposes.
However, if you make any of your personal information publicly available, I can't take any responsibility for it! Additionally I take no responsibility for the safeness of this wiki-software like it's mail functionality.
The wiki-software itself might set cookies or gather information on your connection or system configuration. This has technical and maybe administrative reasons. To learn more about you'll have to consult MediaWiki cause I currently dunno much about either.