If the Perl community fragments into people answering questions in several different places, none of them will be good places to go to get information. The correct solution to get to the thing you want (i.e. more people know where to go to get Perl information), you need to speak with the people running StackOverflow and ask them to direct non-trivial questions about Perl to perlmonks.org.

For reference, I found Perlmonks via Google (searching on "perl forum", I believe, though I do note that "perl help" doesn't seem to find it, which isn't a good thing — maybe someone should tweak the keywords here). It was my second stop, the first being a forum that never answered my question at all.

Knowledge forking is bad. Experts don't have unlimited hours to try to keep an eye on many different locations at once. I would have been happier if that first forum hadn't existed at all.

As an aside, I note that "echo chamber" is a derogatory term, typically used to refer to groups of people with few or no individual ideas that just parrot the loudest talking point currently in use. I'm not sure it's helpful to you to be using that term on the very people you're trying to lure away to join your new clubhouse.