Yes, avoiding abuse should be a priority. I'm struck by how club Facebook pages vary in usefulness. It seems to depend on how far clubs invest time to run them, and on what momentum they pick up with their members.
Comparing 3 Facebook pages from clubs in my area, one is updated daily with catch news, photos, water management issues, news of matches and events like charity fundraisers, and so on. Questions are answered quickly eg on how to buy day tickets. The river stretches are popular and attract a lot of visitors - they are well-bailiffed- and the club has expanded in a good way, increasing availability of local fishing and taking a very positive approach to acquisitions, partnerships and fishery management.
It's always worth going to, not least because it gives you an up-to-the-minute idea of how the fishing is.
Another updates at a glacial pace, and gives the impression that things, including the waters, are going nowhere except perhaps backwards.
A third has a mix of waters and species, but the Facebook page is limited to a few carp-related posts, and hasn't moved for a year and more. It wouldn't be unfair to say that summed up the priority given to the general angler.
I'm not suggesting it's easy to run one, but a good Facebook page seems to be one sign of a go-ahead club trying to connect with its members and guests.