Dragon Age II, Part 2: The Qun is pretty deep, you wouldn't understand it.

[Psyren]

Again, my problem is not with the existence of the Circle itself. It does serve many vital functions, chief of which is the Harrowing. And some mages do deserve Tranquility.

My problem is with sequestering them there for their entire lives. Not only is it barbaric, it's unnecessary - they already have a global tracking system via the phylacteries, Let them be free with the knowledge that if they try to be criminals or deal with demons, they can be hunted down by a combined force of mages and templars anywhere in Thedas that they try to hide. Have them check in or be evaluated periodically, and if they fail to do so, they are dragged back to the Tower to explain why (and perhaps face confinement.) Or restrict the majority to Tower life, but let those who prove they can be trustworthy live out in the world as a reward (if they choose.) The Aes Sedai have a similar system - You can't leave the tower when you're a novice and the Power might kill you, when you're Accepted (senior student) you can walk the grounds and even visit the city occasionally. When you become full Aes Sedai your freedom is returned to you in full, save for any assignments your Ajah might impose.

In short, innocent until proven guilty, not the reverse.