Can I disable the message line when launching ``screen -RR``
Solution 1:
use the option
msgwait 0
in your .screenrc
Also, you may want to turn off the startup message as well
startup_message off
Solution 2:
It's open source, so I doubt these futures can be disabled with a single command argument. My answer would be:
Have a look at the source code, comment out the lines you don't need and compile screen for your machines.