Look:

Miller turns in a script that has the word "Goddamned" in it.  DC prints it.  No black bars.  Apparently, no feedback, no, "uh, if you ever get a second issue out, could you lay off the salty talk"?  So Miller continues to use the word, and others, without SELF-censorship.  DC lets more "goddamned"s through.  They black-bar other words.  They let "sperm bank" through.

If you're a writer who's a fierce critic of the comics code, creator of a previous comics series full of not all-ages material but also lacking in a mature readers warning, trying to create a milieu for "your" Batman, and your editors display a certain (being generous here) inconsistency as regards to language (and other content, frankly), why the frick would you suddenly start SELF-censoring?  "Let the profanities fly; god will know his own."

So, why didn't Miller just use black bars?  Because he doesn't BELIEVE in black bars.  #10 is probably his favorite issue to date!

You know who I blame? The parents! Parents are irresponsible! They should monitor their kids more. If you can't read through pages and pages of comics, or play 100 hours of a videogame before letting your kids read it, you're a failure of a parent! America is a NAZI state of FASCISM that won't let me show whatever I want to children behind their parents back even thought I try.

I'm fine with that. As long as the parents know, then it becomes their decision. My friends and I saw all sorts of innapropriate movies in grade school.

I just find it immature when artists are too scared of losing revenue from having their work labeled properly. Because it's not about artistic expression, it's about money.