I have also never had a credit check to open a checking account; however, based on previous example of DU behavior I would imagine that they do not do things like normal folks so rules for them may be different.
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Normal person/banker conversation:
Normal Person: I'd like to open a new checking account.
Banker: Oh good. What will be the amount of your initial deposit?
Normal Person: $500
Banker: Great. Let's get this done for you.
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DUer/banker conversation:
DUer: I WANT A NEW CHECKING ACCOUNT CORPORATE WHORE!
Banker: Uh? Okay...What will be the amount of your initial deposit?
DUer: MONEY! MONEY! MONEY! THAT'S ALL YOU FASCISTS EVER WANT IS OUR MONEY!
Banker: Well...um...you did come to us so I really do need to know the amount of your initial deposit.
DUer: IF YOU MUST KNOW, SATAN SPAWN, MY INITIAL DEPOSIT WILL BE -$500.
Banker: That is a negative five hundred dollars?
DUer: ARE YOU DEAF MONEY GRABBER? YES, -$500.
Banker: Yes...okay...if I may ask, how can your initial deposit be negative five hundred dollars?
DUer: BECAUSE, THIEF OF DREAMS, I WANT YOU TO GIVE ME $500. ARE YOU STUPID OR SOMETHING?
Banker: Okay...uhm...I think I might understand now. You are seeking a loan.
DUer: I DO NOT WANT A LOAN, FREEPER TROLL! I WANT TO OPEN A CHECKING ACCOUNT!
Banker: Well...with a checking account you have to make an initial deposit NOT an initial withdrawal. You can't really withdraw any money until you have money in the account.
DUer: I HAVE HEARD ENOUGH SCROOGE! I WILL TAKE MY BUSINESS WHERE I WILL BE APPRECIATED!
Banker: Nice day to you then.