It is better to control the energy of yourself than someone else.
The best way is to control the energy surrounding you without delving into some one's mind thought physically or astrally., unless you are being attacked then by all means defend oneself. It is just a matter of clearing the energy and one does not have to mess with an other's thoughts to do this.
However, when someone tries to control another it is not a good thing it is what it is control
The fact that someone wants to control something will not stop just at the quieting of the room but will continue in other aspects of the daily life in public stores and as well as in the home life
One aspect that is taught in the very beginning is that magick is used for the highest good and not for the act of self gratification or the control of anything for that matter.
Perhaps zarkana should elaborate on what it is that is warranted.