iPhoneUtils.isApplicationGenuine 2012 question

I know there are a lot of questions on this here, but most seem possibly outdated.

After sitting in one of my class lectures watching another student share a pirated copy of my game and me subsequently smashing his phone against the corner of the table, I'm starting to think about piracy prevention.

I'm wrote this code:

 bool userIsAJerk = false;
 
 Start (){
     userIsAJerk = !iPhoneUtils.isApplicationGenuine;
 }
 
 Update(){
     if(userIsAJerk )
     {
         beAJerk();
     }
 }
 void beAJerk() {
      GameObject.Instantiate(emptyCube,Vector3.zero,Quaternion.identity);
 }

That's my fun way of making them think the pirated version has a memory leak.

So, my question, how effective is this? Is the "iPhoneUtils.isApplicationGenuine" bool easy to crack? Is making the pirated version seem like its the problem a bad approach? I'm asking in relation to 2012, because the answer may change given time.