In general, it is perfectly acceptable to notify other editors of ongoing discussions, provided that it be done with the intent to improve the quality of the discussion by broadening participation to more fully achieve consensus.
However, canvassing which is done with the intention of influencing the outcome of a discussion in a particular way is considered inappropriate. This is because it compromises the normal consensus decision-making process, and therefore is generally considered disruptive behavior.
An editor who may wish to draw a wider range of informed, but uninvolved, editors to a discussion can place a message at any of the following:
The audience must not be selected on the basis of their opinions—for example, if notices are sent to editors who previously supported deleting an article, then identical notices should be sent to those who supported keeping it. Do not send notices to too many users, and do not send messages to users who have asked not to receive them.
Notifications must be polite, neutrally worded with a neutral title, clear in presentation, and brief—the user can always find out more by clicking on the link to the discussion. Do not use a bot to send messages to multiple pages. The {{}} template may help in notifying people in a quick, simple, and neutral manner.
Note: It is good practice to leave a note at the discussion itself about notifications which have been made, particularly if made to individual users.
Inappropriate notification is generally considered to be disruptive. Canvassing normally involves the posting of messages. However, it may also include other kinds of solicitation, such as a custom signature to automatically append some promotional message to every signed post.
The following behaviors are regarded as characteristic of inappropriate notification (and may be seen as disruptive):
Below are brief explanations of the most common types of inappropriate notification:
Indiscriminately sending announcements to editors can be disruptive for any number of reasons. If the editors are uninvolved, the message has the function of "spam" and is disruptive to that user's experience. More importantly, recruiting too many editors to a WP:dispute resolution can often make resolving the dispute impossible. Remember the purpose of a notification is to improve the dispute resolution process, not to disrupt it.