So beautifully put

I've come across a poem by Janet Minor that sums up so beautifully and entertaining the danger of trusting blindly your spell checker in your word processor and it is reproduced here:

I have a spelling checker
It came with my PC;
It plainly marks four my revue
Mistakes I cannot sea.
I've run this poem threw it,
I'm sure your pleased too no,
Its letter perfect in its weigh,
My checker tolled me sew.

I have seen this kind of malpractice in software development where developers cannot tell the difference between a piece of compiler-happy code and run time logically correct piece of code.