They should apply a common sense standard - can you look up the word in the printed version of the dictionary?
Then let it in.
When I was a kid I looked dirty words in the dictionary. So what?
Why do we continue to underestimate kids?
In grade school we were using 4 letter words all the time and tried to come up with different combinations.
lol - we never got the words from the dictionary, but from others using the words.