No they haven't, not on Destiny. It's only been for having signed their account in on a modded console.
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I've heard of people getting banned for doing the network glitch on PS4
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If people had been banned for it, it would have been reported. There are no reports or even hits on glitches getting someone banned. Only modded consoles. If it's a buddy of yours or something maybe they didn't want to tell you it was because of modded consoles so made up the story.