Moody, does your Chromebook occasionally (like after watching a lot of YouTube) go into some type of freeze where the mouse cursor gets choppy then eventually refuses to move, and then the system outright freezes requiring a restart? i think my Flash Player is what is causing it but there is no way to reproduce it or find its cause. that seems to be the only pattern--extended flash playback/use. forcing a restart fixes it. was worse with Unity but still (rarely) happens in KDE. keep in mind this happened long before i enabled root logins. it was worse in Unity that is for sure--would freeze in a few minutes each time.
"If you treat your system like a kiln, don't be surprised when a brick comes out the other side."