I've actually heard of that being a thing in the past, although I don't know if they can do it anymore because of everyone going so woke.

I know I got stuck in a middle seat next to a obese guy. He didn't make any attempt to stay in his seat area. He man-spread his leg, taking up half of my leg space, and had his elbow sticking 6-8" over the armrest. The only saving grace was the nice, petite old lady sitting on the other side of me who talked to me while I leaned on her armrest because the rude slob was taking up half of my seat.