Do LEDs Scratch LCD screens?

[brijar]

Ok, I may have changed my mind about touching it because it makes a very annoying squeaking noise when the LED touches it, though it doesn't appear to leave any kind of mark, other than the ripple effect. I think I'll just use a button on the pen to do the activating, which will make it much easier to make the pens, plus less possible damage to my monitor.

Thanx,
Brijar!!!