A guy on opendayz.net gave me this brilliant idea for a script, big thanks to titan!
IMPORTANT:
This can delete vehicles completely from the database!
beware that if not set correctly you can end up deleteing vehicles un-intended, wich is mainly the reason why i made a log of vehicle type,pos,cargo and so on when it is triggered
HOWEVER i can not stress this enough, backup, backup, backup ... before you use this!!!
after that warning, heres what i did ...
in server_monitor.sqf