Quis custodiet ipsos custodes? is a Latin phrase found in the work of the Roman poet Juvenal from his Satires (Satire VI, lines 347–348). It is literally translated as "Who will guard the guards themselves?", though it is also known by variant translations, such as "Who watches the watchers?" and "Who will watch the watchmen?". (Wikipedia cause I’m lazy).
How about making a meme of this quote?