I'm with you on that one. I just flashed the Developer Edition RUU, which flashed everything back to stock, including hboot 1.44.0000. But the text on the op says that if I don't see the red text when I boot up the phone, to NOT go back to S-ON. I'm S-OFF and unlocked Bootlocker, and I don't see that text. Could be that it's the Developer Edition. I'm not sure. I want to go back to S-ON, but it's not seeing that red text that's causing me to pause, even with hboot 1.44.0000.
Any help there would be more than appreciated.
Sorry for the confusion. I will try to clarify here and also edit the OP.
The red warning shows if you have a custom recovery. If you have the stock recovery (Flashed manually or through a RUU process) then I believe the red warning does not appear. I have not tinkered with the developers edition of the phone so I can't be certain about differences.
Basically if you see the red warning, it is a sign that something is modified or non-stock and therefore if you tried to s-on and lock with those modified parts it would brick the device.
Since the thread has expanded to cover different methods and users end up here just to finish the locking process, I wanted to give noobs a easy way to see if it was safe to s-on.
After running a RUU all parts should be back to stock and it should be ok to lock and s-on. I left that section because I saw a few reports of users running a RUU and it stated it was successful, however it didn't really flash the RUU, but that was related to not being s-off or locked bootloader, so no worries for those that follow my guide.
EDIT: Original Post has now been corrected. Thanks for the catch