To give another deviant a direct link to this FAQ answer, use the following code in your comment or forum post:
Are there any rules for Collection folder titles?
Collections and other folders which have been given a title which are potentially lewd, offensive or inappropriate can be removed by the deviantART without prior notice.
If your work has been added to a Collection folder with a deliberately offensive title please file a support ticket with deviantART customer service in order to bring this to the attention of our staff. Support tickets may be filed HERE