User blog comment:Obi the LEGO Fan/The Arbitration Committee/@comment-26929881-20140207231236/@comment-4910132-20140208051250

I asked Obi this same question, but after reading their comments here and thinking to myself I've realized that one doesn't need to be "on chat" to show activity, although it is definately the most common public display, along with blog comments and the like, mainly edits. But if you checked the Special:User log (right link?) you are able to see the last time the user has logged on to wikia. Some people just don't like to chat often because it may not provide much for them.

And, if something doesn't work out, we can always regroup.