I never had much to hide on my phone anyway. I don't have any lock passcode enabled because I find it annoying...

the only thing I find useful about them is that back when phones were the size of bricks and you kept them in your pocket it would prevent you from random button mash calling people...
I thought that was there only real purpose to begin with...
now with the age of touchscreens or with a phone who's unlock button isn't so easily pressed in your pocket I think passcodes are something that have just sort of grandfathered into phones. It's not required but wee have yet to phase out of it.

another thing, if I lose my phone and it's locked and passcoded how do I expect anyone who wants to attempt to return my phone, to figure out whose phone it is?