https://forums.oneplus.net/threads/touch-screen-issues-were-listening.186829/
https://www.reddit.com/r/Android/comments/2n5yc9/oneplus_one_user_vantt1_has_potentially_uncovered/
http://forum.xda-developers.com/oneplus-one/help/ghost-touches-invisible-finger-t2832822
most likely a hardware...