Update 2: Bowling explains further: Modern Warfare 3: 5000-Day Bans Explained by Infinity Ward
Update 1: Robert Bowling explained that a 5000 day ban is effectively a permaban.
When the team behind Modern Warfare 3 talked up the new banning system, they meant business.
One player, who shall remain anonymous, has been banned for 5000 days. That’s about 14 years without being able to access the Modern Warfare 3 servers. As you can see below, he has served the first two days of his sentence.
The gist of this story is to never cheat, boost, or look at Robert Bowling the wrong way.