I think a beginner can start doing unison bends pretty quickly. They really help you to start paying attention to pitch. Then once they get the hang of that, train wreck bends are a breeze. Suddenly it starts to sound like you're better than you really are. Those little tricks add up.

You are talking about cheating to basically impress people not what playing a instrument is about..

Not at all. These are just techniques which build upon one another. Not learning them would be like learning to walk, but not bothering to learn how to run or jump. All i'm saying is that the more techniques and variations of those techniques you learn, the more well rounded your game will be. And like legos, one block builds upon the next.

In order to play some ones music like Eric Johnson-cliffs of Dover and joe satriani bends etc are a must know