FWIW - and there’s a lot I disagree with in the recent newer posters’ comments - it’s not like gatecrashing a group of regulars at a pub table. At all.
This is a chat forum. It’s open to the world. It doesn’t have any hierarchy among posters and there are no conditions for admission to any thread. It’s totally different to a group gathering privately round a table, or anywhere else, in a pub.
One of the less attractive features of these otherwise interesting and engaging political threads is the sense that comes out now and again that they’re regarded as a club for like-minded members.