Thought I'd post here to help others who stumble on this thread....
This removed Hands Free Activation for me on Sprint's HTC One M8:
This worked for me, but a couple notes:
- I wasn't able to do the command line or Root Explorer. Both methods gave me errors, seemingly that I didn't have permissions to rename or delete the file. Why would that be? I went into TWRP and 'Fixed Permissions' but that didn't help. -- found it interesting that boot up is a LOT slower now that I fixed permissions.
- I ended up going into TWRP, mounting system and then going into TWRP's file manager to rename the file. Now Hands Free Activation no longer comes up (Thank you!), but I also note that neither PRL Update or Update Profile do anything now. Not a huge deal because before they just errored out anyway, but I would think it would be important to be able to do PRL/Profile updates.