Comment by SilasX

Also the pedophile that tried to obscure his face in pictures with a swirl effect that they were able to reverse enough to identify him:

https://www.minnpost.com/politics-policy/2007/11/you-can-swi...

IIRC there was a Slashdot discussion about it that went "Oh yeah, obviously you need to black out the face entirely, or use a randomized Gaussian blur." "Yeah, or just not molest kids."