Users who are not logged in are called unregistered users, or IP users. These users can edit pages which are not protected or semi-protected; their edits will appear in page histories alongside the IP address from which they were made.
On Wikimedia wikis, unregistered users were originally only at a minor disadvantage to registered users, but as time passed, more features have become unavailable to them. Unregistered editors cannot move pages, upload media, or maintain a watchlist. On the English and Persian Wikipedias, they cannot create pages outside of the "talk" namespace. Because IP addresses are sometimes dynamic, an IP-based user page can be impractical, and in fact it is disallowed on some wikis. Unregistered users are sometimes prohibited from participation in processes such as deletion and permissions debates, or can only participate on a restricted basis (e.g. can leave comments, but cannot vote).
Unregistered users also are not able to select the option of minor edit as this could allow a bad-natured user to make undesirable changes and not be spotted for some time.
Unregistered users are also sometimes referred to as anonymous users, or anons, as opposed to pseudonomous users (usernames on Wikimedia wikis are mostly pen names, not real names). However, this is ambiguous and, strictly speaking, incorrect. The public visibility of an unregistered user's IP address means that their geographical location and/or the organization from which they are posting can be looked up. Also, in extreme legal cases, the computer from which the user contributes could be identified through a subpeona to the ISP, which can eventually lead to identification of the user. In this sense, unregistered users are in fact less anonymous than registered users who do not reveal any personal information.
- Anonymous users should not be allowed to edit articles
- Anonymous users should not be allowed to post external links
- Posting by newcomers should be limited, but not banned
|ローカル:||ブロックされた利用者 – 未登録利用者 – 新規登録済み利用者 – 登録済み利用者 – ボット – 管理者 – ビューロクラット – オーバーサイト – チェックユーザー – IPブロック適用除外 – インポート担当者 – 中央管理通知管理者|
|グローバル:||ロックされたアカウント – 統一済み利用者 – ボット – ロールバッカー – 不正利用フィルター編集者 – インターフェース編集者 – IP block exemption – 新ウィキインポート担当者 – 管理者 – オンブズマン – 創設者 – スタッフ – システム管理者 – スチュワード|