A lot of today's comic industry was built on the insecurities of many readers that continued buying comics as adults. And liked them.
DC spent over 20 years burying the image that comics are for kids so their readers and creators wouldn't feel insecure.
To maintain that image, anything that could be seen as juvenile has to be sequestered off away from the main line of books, and the output cannot reach a level where DC is associated with making primarily 'kiddie' comics.
If that threat does come close, just throw out an Identity Crisis or a Bat-Penis to re-correct the public image and call it a day.