Yes,just ignore them..or mute them,you can do this by the following,click mouse on their nick/name,a symbol ( red circle with a red line running diagonally thru it)will appear,this is what's called the "mute" button,click on that and the player will vanish from view :).
Also,try practicing alone in practice room occassionaly,don't strike the cue ball too hard,give the object ball a chance to go in the pocket instead of blasting it around the rails/cushions like some do.
Fine aim = use this option when lining up a shot,when you think you are at the correct angle @ by following the tip of the cue to the cue ball to object ball to pocket,scroll back to distance and check that the angle of the butt/handle end of the cue is in line to the tip/aiming position for the shot,then click on path button,and that will show you how accurate you were to the shot you were going to play :) gl.