I think you meant to use the word lose not loose. I suspect you mean lose the data as in delete it, not loose as in releasing the data to others.
My town messed up on one of the billboards, though, and for a while commuters got to see "Booze it and Loose It!", which conveys a somewhat more carefree message.
These are the kind of classic "Spell checking. It's impotent!" type of situations. For long bits of text, I can see how somethings might slip through. When it's only 4 friggin words, and it's a campaign being slapped up on multiple billboards for everyone to see, one might think letting someone else review/approve would be a good idea. Thinking it might have actually done that and still nobody caught it is even more funny/sad.