Reference for http://www.bungie.net/Platform/Destiny2/Stats/PostGameCarnageReport/{activityId}/Report/

Report a player that you met in an activity that was engaging in ToS-violating activities. Both you and the offending player must have played in the activityId passed in. Please use this judiciously and only when you have strong suspicions of violation, pretty please.

Url: http://www.bungie.net/Platform/Destiny2/Stats/PostGameCarnageReport/{activityId}/Report/

HTTP Method: POST

Requires Sign-in: true

Url Parameters:

Parameter Name	Description
activityId	The ID of the activity where you ran into the brigand that you're reporting.

Request/Response Body Formats:

Message Direction	Format	Body
Request	JSON	JSON object
Response	JSON	JSON object

The following is an example of a request JSON body for this method.

{
  "reasonCategoryHashes": null,
  "reasonHashes": null,
  "offendingCharacterId": "0"
}

The following is an example of a response JSON body for this method.

{
  "Response": 0,
  "ErrorCode": 0,
  "ThrottleSeconds": 0,
  "ErrorStatus": null,
  "Message": null,
  "MessageData": null,
  "DetailedErrorTrace": null
}