Mum said that not everyone that leaves the organisation is an apostate... only those that speak negatively of the organisation.
Light bulb, she's right ... to a point. If I left and never criticised the WTS, but began celebrating birthdays or attending another church, I'd be an apostate. If I leave, I leave because I disagree with them. But the only way I can avoid being branded an apostate is to never ever say anything critical about the organisation. It's a form of blackmail to ensure people never say anything critical of the religion once they leave.
If I'm true to myself, why should I never be allowed to discuss with friends, workmates ... or other JWs ... the reasons why I left and the reasons why I disagree with them?