From what I understood via Google Translate: someone changes sides to destroy defending friendly tanks.
1. We turn on "Friendly fire return" setting in dserver. If someone shoots friendly, they get damaged. However, this is unrealistic and it applies to planes too, so there are undesired effects.
2. You report to me or LLv34_Untamo (firstname.lastname@example.org) the players doing this, with video / track of the incident. We can discipline.
3. We add functionality to the background java application: someone in a tank shoots friendly objects -> kick & ban.
Currently, we would like to go with option 2. If there is much abuse, we may need to go with 3.