comes up on Caller ID as "Community Event" - they never leave a message. I have also received calls from  similar numbers - 682-503-6877, 682-503-6909, 682-503-6893 - all show as "Community Event" so they obviously have a phone bank set up

I've blocked all calls from the 682 area code listed as "Community Event" - so they can just keep on calling and my system will simply hang up on them, lol.