There's nothing to worry about.
Twitter periodically suspends users for spam and other rogue
activities. Such suspended users might still be part of friends/ids
but their profile information will not be returned.
On Jul 22, 10:56 pm, soung3 <sou...@gmail.com> wrote:
> I've encountered an issue with the friends/ids where the IDs returned
> can contain IDs of non-existent users. One example of this can be
> found when getting the friends of the user id = 16067667 (http://
> api.twitter.com/1/friends/ids.xml?id=16067667). Within the IDs
> returned, there is a value = 28745723, which can not be found when
> using users/show (http://api.twitter.com/1/users/show.xml?
> Has anyone else encountered the same bug when using the friends/ids or
> followers/ids endpoints?