well i agree with embro1001
While true, they will be suspicious if *something* happens on the school server and your bash history *happens* to be gone. This happened to me once. Someone wrote a perl script which basically created a monstrous file by recursively adding itself... to itself... in multiple threads
the admins wants to keep a track of who is doing what , and if somr thing goes wrong ,it will be hardly a matter of minites untill he is caught,so think there is no need to panic!