Disabling a specific key

[Patrick O'Callaghan]

I have a keyboard (Microsoft Wireless 800) which has an Insert key right
beside the Backspace and I keep hitting it by accident and changing the
insert mode of whatever I'm typing. I want to disable this key
completely as I can think of no circumstance in which it would ever be
useful. If it can't be disabled I would consider remapping it to a
second Backspace.

Any ideas? I'm using KDE under F21 but I would hope for a general
solution to this.

poc