IDK... The aquarium hobby seems to be surprisingly chock full of people with axes to grind. Every group has members who left another group because they can't stand someone in it, or how it is run, or because someone answered them in an unsatisfactory manner, be it unfriendly, or teasing or unhelpful, or just voiced an opinion which was at odds with their own view. It's all so serious. As if we don't have enough drama in our lives.
People go and make their own groups because they can run them better, or person "X" will not be there. They go off to found the "true church", where all is better and everyone is friendly and helpful and no sarcasm will ever ever be used..
Other groups form, with their own cliques and politics and the hobby fragments and churns. This effect can be seen in any school playground and is not in and of itself a bad thing; it just is. There is always a certain amount of churn, and often people who forsake this site for whatever reason find their way back after a couple of years. Some stick around but post on their other hobbies as they don't even keep fish anymore.
There are plenty of punters who like to ghost the forums and make pronouncements or funny posts or just troll, and that is fine. The internet is a playground and that is what makes it fun.
The main difference is this: The PCS is the only group I am aware of that holds regular meetings.
It has always been my observation that whatever people are like on the internet, they are all perfectly nice and friendly people in the flesh, and that the forum/facebook page is a poor substitute for a PCS meeting. In person people are usually both more friendly and more adult. In this the Society has it over the myriad facebook pages and the like and anyone who judges and discards the PCS based only on the website is missing out on the better part of the club.
Maybe my view is getting old fashioned, but that's just my 10c.