TEXTING Question

To unsubscribe from automated text messages sent to your mobile phone number, just respond to the text with one of the following words:
STOP
UNSUBSCRIBE
END
QUIT
CANCEL
“Stop” and “Unsubscribe” are the most common commands.

Note that many automated SMS services share “shortcode” numbers they send you messages from. Sending a message like “STOP” or “UNSUBSCRIBE” will remove you from the list that last texted you from the number. To remove yourself from all lists sharing that shortcode number, send this message instead:

STOP ALL

QUESTION: Do those commands need to be in ALL CAPS? I vote no but am wanting to confirm my suspicions.