Yeah I 'peppered' some code at work with stuff. It was on a large application that I wrote mostly in my own time in an increadibly short time frame. They were all in the form of print statements that I used for debugging. Things (tamed down) like print "WTF does \$var = $var\n". It helped me to stay amused while I pulled off what many had said 'Can't be done'. I did forget about them until our configuration management team checked in the code... at which point I quickly deleted the offensive lines

Moral of the story: If you're good and pull off the impossible and a little racey language helps to get the job done WTF?