They can to an extent. Disconnected due to an error is logged. Volunteering to drop is not. On top of that people are being reported. So yes there is ways to know. And yes they should do something to punish them because there are just as many costumers upset about as there are ones saying "it's okay". Personally if these cheeses/cheats didn't affect me or my gameplay in anyway shape or form I really wouldn't care. But since Bungie is intentionally holding back content so this stuff can be player tested, it is frustrating me. I've been ready for hardmode since week 2 and I'm having to wait so they can see what things they need to fix. Given the choice ban these kids and release my hard mode every time.