I've never had this problem. My teachers are split in two. You either have the ones who defintely oboe their computers and are capable of fixing anything that comes up, and there are the new who are hopeless at using the computer. Fortuantely, the latter are quite
fine with you offering help or doing stuff yourself. If you actually were playing around with something that you shouldn't have been, they probably wouldn't be able tonspot that it's not allowed.
Normally though, the schools computer technicians only ever are called out when the teachers have a problem, which generally tends to be something stupid, such as not knowing why sound isn't working when they've got the speakers turned off.