Elderly neighbor stands on a bucket to peer over our block fence into our yard, how do we get him to stop
So my family (me 28F, niece 21F, mom 65F, dad 68M) bought & moved to the Southwest suburbs back in February. The houses are close, but we have tall 6ftish concrete block privacy walls. We have a pool and our neighbor doesn't. He’s an elderly guy in his 70s or 80s who lives next door with his wife, his granddaughter, 2 dogs and another couple who rents the other half of the house. He comes and goes all day and we always give him a polite wave out front, at first I thought he was just lonely and being neighborly but now it's just getting annoying, rude and borderline weird.
He has made a habit of dragging a Home Depot bucket or overturned flower pot to the wall to peek directly over into our yard. It’s gotten ridiculously uncomfortable. Twice now when my niece, my mom and I were swimming in our pool, his head popped over the wall asking questions about who we were and where my dad was, does he like to swim etc. and my mom unfortunately and stupidly blurted out my name, that my dad swims, and even where my dad works and that he was working that exact day. Other times, I’ll just be laying on our outdoor couch trying to close my eyes and relax, and suddenly a head pops up staring at me. Once when I was outside on an important phone call, I accidentally made eye contact with him hovering over the wall and looked away to keep talking, and he actually went to my mom later to COMPLAIN that "he SAW that your daughter saw me," like I'm obligated to entertain him. Most recently, my mom and I were sitting on the patio decompressing, and his head popped up to interrupt us and ask her, "who is this fine little lady 😏" about me, even though I've been introduced to him multiple times and my mom just said oh that's " my name " and I didn't even turn around because I didn't feel like talking to him and do not want to, I was literally in the middle of a conversation. I've never spoken to him before and literally just ignore him, if someone else is outside with me they'll speak to him but I don't.
Now I find myself tip toeing around my own patio so he doesn't hear me outside, opening and closing the door very quietly so he doesn't hear it and come running outside, and it makes me sick and second guess if I want to go out, that I can't even close my eyes by my own pool without waiting for his head to pop up over the wall and someone start asking me questions or even looking at everything in my yard!
Unsure if there's any privacy things/shades that can be done?
Edited to add, I don't own the house, it's my parents, I just live here, I'm physically disabled, as a very petite female, NO I'm not keen on confrontation, yes I'm 28 but I'm more vulnerable, being only 4 feet tall and 75 lbs ( rare form of dwarfism ) means yeah I don't want to piss off a neighbor?! If I was 40, would that still be okay for him to do that? If I was 6 ft tall, would it still be okay? If I was a man would it still be okay? Weather he has dementia or not, when is it okay for a man or ANYBODY of any gender to stand on something to look into their neighbors yard? This post isn't weather or not he's a creep, it's just " what would you do "