You know that making up complaints generally gets perfectly innocent staff members on minimum wage in trouble, even disciplinary or loss of their job remember it might be another student your doing out of a job.
I get ******** complaints all the time at work people make up that they havent recieved parts of their shopping or that its out of date! When you know that it was definatly picked and put in the same bag as other items they have recieved or even deciding that the item didnt arrive a MONTH after they ordered it (rather they have used/eaten it and now want another one for free!)