I've done this in the past too and it works. Right now though I have it set so that I know the passcode to unlock it all, but that small amount of pain to go and unlock it is enough to make me pause and think about whether I actually do need to check the news, etc. Very rarely is the answer yes, but when I do need an actual smart phone (confirm a ticket on some random website for example) it's nice to have the ability to do so. Just have to have the discipline to lock it back down!