I have noticed that students have been reserving computers by placing hand-written 'Not Working' signs on the monitors. It would be useful if library staff could check these computers and, if a computer is indeed dysfunctional, to place a GENUINE sign (i.e. with UQ Logo, etc) on the computer indicating its status. And, obviously, if the computer is not dysfunctional, to remove the false advertisement. Alternatively (or perhaps, concurrently), a university-wide email announcement could be made, informing students to ignore all non-official signage.
With the increase in student numbers, I have often noticed many people waiting to use computers, and have often had to wait for one myself to work on an assignment. Although one might applaud their cunning, this behaviour from a few students is unfair to the rest of us.