Only a select number of individuals are obliged to be censored with a bar across the eyes. This includes certain types of criminals, confidential news sources, North Korean defectors, and members of special forces groups. In all cases, it’s a must that their identities be obscured. In the case of these sunglasses though, it’s just pure fashion statement.
A rather awful fashion statement, but a fashion statement still. They’re full fledged sunglasses too, so you can take a pair of these outdoors and look odd in a cool way. Or maybe plaid odd in no cool way or manner.
This would baffle the people behind CCTV cams though. Imagine the look on their faces when some one passes by with their eyes barred black. Weird.