I can't do it. I can't keep weeding out the spammers and the scammers.
They join free groups like this one and pretend to be interested in helping just to solicit contact info and try to sell people ABSOLUTE TRASH SERVICES.
My solution: A minimal paywall. $1 for 365 days of membership.
You'll be surprised (or maybe you won't be) at how many people won't make the switch. Almost 900 people here and I bet less than 20% of people come over to the new group, even though it's basically still free.
November 8th, this group will be deleted.