T-Mobile has stated that locked bootloader is necessary because rooting the phone voids the warranty and users may install software that can harm the device.
Every user that roots accepts the their warranty may be voided and that the device may be harmed.
The vast majority of T-Mobile devices do not have a locked bootloader and can be rooted.
This is a surprising and very disappointing move by the so called "uncarrier".
Please sign this petition which will be sent to the Executive Response team at T-Mobile.
96 people have now signed! Keep spreading the word! So close