The first was a pilot put down his ignitor, it started to roll, he reached for it and was nicked by the prop. It sent our safety officer into a tizzy and he wanted to do away with them.
A friend of mine did EXACTLY that but his nick was 18 stitches.
No reason to eliminate NiCad glow-drivers, though. These things happen. ;-) I use a field-box 12v wired plug-in glow driver.