As goan said, if it activates, you're driving wrong, or you're just messing about. The only time mine lights up is when I want it to.
Setting off in icy conditions should be done in second gear if it's really slippy.If you've got a big old 2 litre diesel, all you need to do is gently lift your foot off the clutch, you don't need the accelerator until you're moving.
Same with braking, slowing down in snow and ice should be done with the engine, if you really *must* brake, kiss the pedal like your were licking snowflakes off connie's tummy. (again, unless you're just messing about in which case bang it)