Screen Guard is important For Touch System Because It give protection from unwanted scratches

Yes It may be possible if quality is not good and hardness is more Attachments to the screen may affect the touch sensitivity. If you attach accessories, such as screen protectors to the touch screen, the touch screen may not work properly

No, The thicker the screen guard, the tough it is and thus affording our screens resistance against damages

It is Very Simple to take off screen protector Pry Up the Corners from one side Slightly.