First of all, that's not a serious issue that may happen with any of the devices with touch display. I will not go in deep working of screens but the work with the potential difference generated by our touch or sticks/stylus.
The Turbo-Power brick which is bundled in the box is the culprit, (Only for those users who are facing ghost touch while charging.)
Hereby I will like to say that "You may try using a normal charger and that check if the problem persists."
P.S.- Those users who don't have ghost touch problem while using Turbo-Power brick they will experience the same after 8-10 months. So Prevention is always Better than cure..
And I think, That bundled brick is just for emergency usage..
You may go for Samsung/Micosoft micro-USB pinned charger, they are best in class..