Thank you for your consideration.
I think you're suggesting maybe there should be a forum (I suppose under Travel&Dining?) for consumer protection generally, and then things like EU261/EC261/UK261, the Israeli one, the Canadian one, etc. could have their own threads (I don't know whether FT has any concept of master threads that consolidate key posts/extracts from other threads?). I think that's a reasonable point. I focused on *261 because this has developed a very rich set of case law, with a lot of interesting corner cases, but this may well also be the case in Israel and Canada.
I think you're right that stuff like UA claiming extraordinary circumstances at LHR would probably be best in a UA forum, except if it's some kind of general consideration of the form "can an airline claim extraordinary circumstances at a non-base airport if they couldn't buy fuel".
I agree that enforcement is also of interest. Conceivably this could be done in per-country forums, again except if it's generic, e.g. "what are the mechanisms for people outside the EU(+EEA+CH+UK) to make an EU261 claim?".
How does creation of new forums work? Is there some kind of form to fill in? Is it put to some kind of member vote?