Locked bootloaders are a bad idea in the world of Android.

It's your phone, and you should be able to do what you want with it!

Android Updates don't make it to all devices, but with an unlocked bootloader you can flash a newer version of Android resulting in better performance, better compatibility with new software, and fewer viruses.

With an unlocked bootloader Android Developers can help make Android even better!

With an unlocked bootloader, restoring data after a factory reset is much easier.

There are unlimited possibilities to what you can do when you have an unlocked bootloader.

And for those concerned at the above listed companies, it is easy to implement a system that void users warranties after unlocking bootloaders. Also if you unlock bootloaders, you'll have less FCC Complaints about Block C being violated!