Perhaps it can also have catastrophic results. Here is a case where it appears
something got too hot from the charging process.
Most device manufacturers caution you to not leave a charging device unattended. I wonder if Apple has that clause written down anywhere that I've agreed to?
I know I personally don't leave charging stuff unattended. Closest I get to that is sometimes leaving my phone charging when I go to bed. But then again I'm home and I have smoke detectors. I would never leave a phone home alone on charge.