Wikipedia:Casting aspersions

On Wikipedia, casting aspersions is a situation where an editor accuses another editor or a group of editors of misbehavior without evidence, especially when the accusations are repeated or particularly severe. Because a persistent pattern of false or unsupported allegations can be highly damaging to a collaborative editing environment, such accusations will be collectively considered a personal attack.

Significant concerns about the behavior of other users should be first resolved directly with the users concerned. If this is not possible, they should be addressed with evidence through the appropriate dispute resolution procedures.

Selected examples 2008–2015
The Arbitration Committee passed several principles on the subject of casting aspersions. These principles are an application of the policy against personal attacks. Principles highlight key provisions of policy, procedure, or community practice which are relevant to the dispute under consideration; and, where appropriate, include the committee's interpretation of such provisions in the context of the dispute.