When noop is set on, someone who joins an unregistered room will not get opped even if they are the first person to join. The effect of this is that they cannot register nor control the room. The default is off.
/as security set noop on
If newchan is set to all and noop is set to on, then people can join dynamic rooms, but they cannot control them. This may be the effect you want if you want all users to have equal power in new rooms. Although then you still need to have network operators running new rooms or let them remain unsupervised.