create new identities for every account and page and game you use that they cant find out about.
and when they ask, you actually dont tell them...
let them be mad. they drove you to do it and they have no one to thank but themselves.
in my day we didnt fear our parents. and those like me built credit and own things and have things in our names and dont live at home.
stop being scared of your parents. its laughable and confusing to me you are even asking these questions, as they seem self explanatory.