Rule no 1. Setting healthy boundaries
Make sure to check all your contacts in social media and remove anyone the alienating parent may be using to stalk you.
Check all your contacts in messenger, whats app, skype etc and delete anyone who could cause you problems.
Remove anyone posing to be a friend but not actually being a friend.
Block any users that have several profiles under the same name, these are usually fake profiles.
Ensure that no one can gleam information from your social media to try and spoil Christmas for you and your loved ones, we all know the emotional games Narcissists and and people with BPD like to do!
Now you have cleaned up your social media be safe in the knowledge you can have a private Christmas and start the New Year with a healthy computer, tablet and phone.