In my area we only give the safe sign if there is a play. Everyone is different, of course
"About to receive" was removed from the LL baseball/softball books about 6 years ago. As in ASA or NFHS the fielder must have the ball.
I'll be at our World Series in Portland tomorrow and Monday, so you might get some "bonus coverage" before the TV games. The best parts of being there: The ice cream at the concession stand (the fields are owned by the dairy that makes Baskin & Robbins)...and not hearing Michele Smith!