Driving instructor training difficulties

I was just living driving school the other day after my lectures when I have noticed an information on the board located in the hall of the school. Whenever there is something important that everyone attending the course has to know it is put up on this board. This note was quite short and it has a caption at the top saying: Driving instructor training difficulties. As the second part of my course (practical part) is about to begin for me I was really interested in this. I read the text quickly and I was able to find out that there were some problems last week at the course. To be specific there was a problem with cars which appear to be damaged. The school is not really sure how did it happen but 7 out of 14 cars owned by this school seems to have some minor damages. There is an prediction that they might have been created at night by some people who wanted to take revenge on the school for not finishing their course due to bad results of tests. I have no idea if it is the truth but I just hope that I wouldn have such problems during the rest of my driving instructor training. On the other hand I hope that this story is not made up to hide that the school is not taking care of their vehicles and students. But from what I have seen this driving center seems to be responsible and it wouldn lie to us.