Track Etiquette

Rushing the gap and pinning the rider are pretty advanced moves..If your question is..is it (pinning) legal then yes it is..However get into the basics first and this will come later.

Imagine the rider you are pinning isnt experienced and gives you a flick at full speed are you capable of riding (missing) it?

Sorry RPM, bad wording. My question was really how it would be handled in a racing scenario where things are more sensitive to error.
Assuming all riders are experienced, let's say I look back and there's no one behind me, I rush the gap on rider 3 as you mention, is it then an acceptable tactic to overtake close enough to pin rider 3 in place until you've moved past, knowing that he would look before moving from his position(as Oz mentions below)?