I am part of a neighbourhood Whatsapp group, it's sometimes useful and it's sometimes good to help out. But why oh why does everyone else seem compelled to respond when one of the members asks "does anyone have my package which was supposed to have been delivered today?" with things like "not here, sorry". It does my head in! If you've got it, say so, but if you haven't, just keep quiet. Everyone else doesn't need 15 messages saying the same irrelevant thing, sometimes >24 hours later than the question was asked!
Oh, and clearly not "everyone else" sends the inane responses - presumably 50% of the members are like me and keep quiet.