If you suspect cheating you can report them and move on with your day. The time out is only for 30 minutes. These forums are the only way to contact bungie.
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reporting them does nothing if they arent in the game. The person responsible said to another in twitch chat and even reporting them to xbox or bungie they aren't doing anything about it.
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The report took only does something if they are actually cheating. They will not be banned if they weren’t cheating. You can read more into it here. https://www.bungie.net/mobi/en/about/troubleshoot?id=13967#contact