When the C became a K

At what point did it become ok to begin words with a "k" instead of using the correct "c"?

If it's advertising value these people are after, nothing brings' em in like a blatent misspelling.

Chances Are You’re Slow

Anybody that needs to see one of these on the back of something to identify that it is moving at a slower rate of speed shouldn’t be on the road.

 In effect we’re basically acknowledging and accepting the fact that those drivers are at high risk of rear ending whatever’s in front of them on the road at any given moment and we’ll not only tolerate it, we’ll coddle them.

And that’s just wrong.