Step 4 below does not work via website.
Nor does the app reporting method.
I have a screen shot of the individual I would like to report.
Report a Destiny Player on Bungie.net
Players who suspect other players of cheating or violating Bungie's Terms of Service can report players on Bungie.net through their Game History page.
1. Find the game with the suspected cheating and click the title
2. Click the “Opponents Defeated” tab
3. Find the player you suspect of cheating and click their name
4. After clicking their name, click the “Report Player” button
5. Select the category you prefer to report the player, and click the “Send Report" button
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Hey there, I don’t believe this option is available from your game history on the website (at least I’m not seeing the option either). As for the companion app, to my knowledge it is only available on Android at this time. You can use the report a player contact form found at this bottom of this article however. https://www.bungie.net/en/Help/Article/12960