I would be horrified that people have to go to those lengths to preserve privacy but then again, we're dealing with Facebook. I'm barely surprised, all I can think of is "That's a good idea. Why didn't I think of that?"
I guess, but what is this loss? It seems like being non-searchable is effectively "security through obscurity", not any kind of actual information restriction (like not giving data you don't want known to FB in the first place). What's the tangible badness in this?
You have a point. You could find someones profile by entering their username or their ID but that's impractical. After thinking about it, ultimately it doesn't make a lot of sense; if you have a Facebook account, you should be able to find people using friends-of-friends or by other means.
I guess the primary use-case is to help prevent cyberbullying?
