I feed pinkies and with the exception of one glider, they're all precious angels.
And it's a myth that female gliders are more likely to cannibalize their joeys if they eat pinkies since joeys and pinkies look similar. Like misscarl said, feeding pinkies has nothing to do with cannibalization. Gliders know the difference between joeys and pinkies. When they cannibalize, it has to do with health problems in the joeys, environmental factors, the mom not ready to take care of joeys, etc.