When I anticipate unwanted feedback from particular individuals I just block them from seeing the posts... But like you said, this does run teh risk of accidentally showing people things you don't want to... But, that's the only solution I can think that doesn't involve having a conversation with your dad about it.
“We need to remember what's important in life: friends, waffles, work. Or waffles, friends, work. Doesn't matter, but work is third.” - Leslie Knope
"Nothing lasts forever, some things aren't meant to be. But you'll never find the answers 'til you set your old heart free."