Maybe you never heard of someone getting their house tracked back to through their phone, I've seen it happen to a friend. Yes phones are more valuable and sought after now and an easy resale, but you never know what information they'll grab before they flip it. If you don't feel the need to designate your home location to somewhere else then you don't have to, I'm just handing out some advice. As it has happened to someone I know, I definitely don't want to go through what they went. They took their phone, some things at home after staking it out and figuring out their schedule, and more importantly their peace of mind. Yes they had their phone deactivated and everything as soon as they found out they lost it, but it was too late by then, and this was all within a half hour span from the loss of the phone to reporting it lost. Also, many people don't use a PIN to protect their phone, I don't use one myself. For people who use their phone as much as I do, it's cumbersome to have to keep entering a 4-digit number just to check some quick things, a simple swipe to unlock is far easier for myself and many others.
Yes I'm concerned about them flipping through my e-mails, but I rather have them flip through my e-mail than go through ever single drawer or cabinet in my home.
I'm not trying to get into an argument with anyone, just handing out some advice. Whether anyone here decides to take that advice is up to them. I'd also recommend getting an app, such as SeekDroid, where you are given full control over your phone through your internet browser or text message (from another phone of course).
I'm not arguing. I just don't understand. A simple Spokeo.com search will reveal a LOT more than your lost phone ever will.
Also, first tenet of security: "it's cumbersome to have to keep entering a 4-digit number just to check some quick things" is the same thing as "it's cumbersome to have to keep pulling my keys out to lock my door just to go to the corner store". Of course it is - that's the point. You inconvenience yourself for a few seconds and gain at least some security and peace of mind in return. No, it won't stop a determined thief. But it's better than not bothering.
Like you, I'm just handing out advice. Lock. Entering a pin takes 2 seconds at most.