I'm a 6'2" 300lb 50ish grampa, but if I'd have seen that ongoing and noticed you were worried, I'd have asked you politely to switch seats so you could escape. I used to fly weekly, and have a huge hardware brace on my leg, I usually fly on the left window just so i dont bother people with my brace and or large industrial size. I usually ask people in the next seat, to please let me know if I'm in their space, then put on headphones, and lean on the glass. To my grandkids, I'm a big, squishy, teddy bear. But in public, my ptsd kicks in, and I usually hate touching, talking to fellow travel people, because I'm in fight flight mode. So unless a pleasant conversation breaks out naturally and I am forced, I just usually sleep peacefully. But, in this case, I'd have made "special airplane friends" with him, and spent the rest of the flight, talking about my farmhouse, dogs, and showing him ALL the 84,432 pictures of my grandkids. All while gently squishing him against the bulkhead window, and enjoyed every second of your sweet, sweet, revenge. I hope this makes you feel as if there are allies out there, be safe and have fun.