Below is the reply from the iTunes rep. He's basically saying it's Warner Bros, not them. I have no idea if that's true, but if you want to voice your frustration to Warner Bros, I suggest you email wbdigitalcopysupport@wb.com
I did send the same question to the guy from WB who phoned me on Friday night. Unfortunately, I don't really have an email address for him (he said he was going to email me, and once again, that did not happen), so I just emailed the general support email address and asked that it be forwarded to him. I have no idea if that will be successful.
Anyway, here's what iTunes says...
"Unfortunately, Apple has no say in the content that is provided on the iTunes Store. If the distributor choose to add a file, remove it a week later, and then add it again 2 weeks after that, they have the right to do so. The only time Apple will step in is if it is apparent that the distributor is doing this for some form of financial gain. (like causing customers to be unable to re-download free of charge, cause the newly added content is now "new" items, and not the same past customers purchased) In theses situations we will step in. However the iTunes Store is just a platform for retailers to distribute there content to Apple Devices, this helps us ensure the safety of our customers, and the integrity of our devices.
We are making great leaps in the stipulations we require the providers to follow, to help our customers get the best quality content available. Just as an example, we have just made it mandatory for all films to have 'Closed Captioning' files provided, within one year from release date, or else the content will be pulled. This ensures our hearing impaired customers have access to the same great content that non-hearing impaired customers receive.
If the content has been removed from the iTunes Store. It would have been removed from the providers themselves, or by Apple, in the best interest of our loyal customers. However I could not state specifically for the content you are referencing, as this is not information we are entitled too.
I hope you have found this information helpful. I'd like to thank you for your continuing business with us at Apple."