Board Thread:General Discussion/@comment-25805803-20160331174620/@comment--20160331192002

Yeah, those welcome messages are automatically done by wikia with the welcoming tool under the latest editing admin (or specific admin if local wiki set it up that way).

For example this welcome message under your username. If you think the welcoming tool isn't working or else "some users aren't getting welcomed" you can Special:Contact/bug it.