Family whatsapp

Go into the settings and turn off all notifications, then you will only know they've posted if you actually choose to go and look. They probably won't notice that you aren't commenting but if they do you can appear confused/vague and claim something must have happened on your phone, perhaps a software update and you just haven't been seeing any posts!

I think MissAdventure is right. Skim read it to make sure you don't miss anything important. You can comment occasionally on things which interest you and just quietly ignore the rest.

If you really want to leave the group, do so but you might miss some important news or get it later.

You can leave the group which might cause an adverse reaction but much simpler just don't open any messages. Being older gives us a wonderful excuse of not being IT savvy. If questioned just say you find you can't cope with yet another social network.

I would just literally skim read it. Just glance over it: job done.

Just don’t open it no one forcing you to take part just be ‘too busy’