I've seen this phenomenon come up on another forum I'm an administrator of. Canadians on that forum tend to hang out in the Canadian regional forums to talk about technical car details instead of taking those discussions to the appropriate (and often already-existing) threads in the technical sections. The result is redundant conversations and a greater tendency for misinformation to spread because the same technical discussions are happening in multiple different forum sections.
The regional forums, in my opinion, should be about regional discussions. Examples include Supercharger and other charging locations, weather events, good deals from local vendors, service centers, etc. Technical discussions about vehicle dynamics, behavior, repairs, etc. should be taking place in the model-specific sections.