One must be very stupid to assume that get banned until the end of the season. Here is detected by software on the user's computer during the whole season and no substitution of IP, or use VPN or other methods do not help on this.
Properly noticed that here is marked throughout the season, and some players get banned before going next.
For economic reasons, Blizzard is not beneficial to ban all at once.
So for those who consider themselves the most intelligent and special - we can say definitely that you are banned next time. You left before the end of next season, but you marked.