I don't think I was being unreasonable but wanted to get others' take on it. BA economy flight, middle seat, man in front of me reclined his seat then had a go at me because he could feel my knees through the back of his seat. I explained that a 5,10'', short of amputation there wasn't a lot I could do about it and perhaps the problem was more about him reclining his seat onto my knees. At which point he then doubled down and said I should book first class. I'm afraid I didn't cover myself in glory and told him in no uncertain terms where to go. So, my position is that on economy flights where space is limited, just because you can recline your seat, it doesn't mean you should, AIBU?