Managing Anti-Theft for KitKat users

Could somebody give me a link (I haven’t found it on the forum or overlooked) to a step-by-step instruction for KitKat users, whose smartphones are expected to be remotely managed via SMS, how to make such SMS not visible (or unreadable)?

I don’t use Kit-Kat, but do have Google Hangouts. i am getting the warning messages when sending SMS Commands to phones in my household and also want to know how/where the commands are visible and how to hide them. i see no Kit-Kat settings as mentioned in the warnings.

If you find any info. on this please repost here. I will be following this thread.

Sorry but the question needs an answer. This is not my personal question and Russian-speaking users asked me to remind that they are waiting for a reply.

I would also like to know if hiding SMS is possible. (Without using the web interface or the in app special feature)