I'm going to hide my laptop and ps4 when my family visits for holidays
Why are you hiding your laptop and PS4 from your family?
My grandmother is a very mean woman and she will play my games on my PS4
Family can be intrusive so it is understandable that you don't want them messing with your stuff and breaking it. It is better to spend your time with them without stress.
I don't care about spending time with them. I will hide my stuff from them and fuck around on social media.
I can understand not wanting them to mess with your things, it could damage them. However you should compromise and spend time with them so that they don't feel like you don't care about them. It will cause friction in the family otherwise.