Met a guy who could punch/shoot at us, while lagging by pulling the cable to the router and plug it back in.
Demonstration and Explanation by a guy in this video:
https://www.youtube.com/watch?v=Aem_MNY2L8k (From 09/02/2015 on 0.58 Stable, Server: "DayzTV | Public EU | Restart 3H - 185.62.204.113:2402")
The guy also said that he is able to open doors and shoot the people through them while losing connection.