Pebble and others run a pretty tight ship.
You'd be amazed at what they have to put up with.
Go to one of the unmoderated YouTube chats and you'll see insanity of a spectacular level scrolling at an almost unreadable rate. It's wild. Religious tracts, doomsayers, fear merchants, post of nothing but 25 emojis posted every minute, over and over again.
The chats Pebble moderates are tolerable. There are many geologists and other interested people that are teaching and learning and share what they know. They ask good questions and are curious.
I've learned so much just reading them. They have a saying that goes something like "we all share, we all learn"