An argument could be made that the credits page isn't really part of the scanlation
I disagree.
Is the credits page a part of the original manga? No.
Is it a part of the scanlation? Absolutely.
The scanlator did the work. He translated the manga, and he decided what should or shouldn't be there.
That is for no-one but themselves to decide. What the reader decides is whether or not they want to read the finished product.
And absolutely, the aggregator has no right whatsoever to determine what is or isn't in a finished scanlation, nor what parts they think should or shouldn't be in it. That is solely the job of the scanlator.
They can only choose whether they want to host the finished product or not. If you remove pages, it is no longer the complete scanlation as intended by the person who has done the work.
You have effectively stolen it from them and changed it without their permission, just as the scanlator is stealing and changing the work of the manga author.
If you choose not to host it, you are then censoring their works. If you try to move it somewhere it will never be seen, you are then censoring their works.
That's fine, as it is the right of the site owner to choose what they will or won't host. It will anger people, but it is still your right to do so.
And it is the right of the site user to see what you have done, and to stop using your site because of it.
You know it's wrong, and that's why you did nothing for so long. It's why you should continue to do nothing.
And nothing will come of it if you do. A comment section will be talking about part of the scanlation they just read. That is all.
By default, the majority must block content they don't like, as only a very small minority of works would require it.
However, the majority is stupid and lazy, so they won't. It makes no difference to me then, if instead by default the minority must reveal the content they do like.
Such a change would be an acceptable outcome, but only if those rules were removed, and scanlators were instead required to mark their content as politically incorrect if it is.
To remove the content is censorship. To hide the content from everyone is censorship. To hide it only from those who wish not to see it, is fair enough.
If you must intentionally choose to go looking for it, you have no right then to complain about it's presence.