Originally Posted by
geometry
on other flights, I couldn't care less if someone poaches the seat next to me in Economy Plus. If they want to sit in the exit row middle seat next to me for extra legroom and they have thick skin to poach it, go right ahead.
Unfortunately, I do mind when it's on 10-abreast UA 777-300ER. However, I'm not the kind of person who rats on fellow passengers. Sadly, UA flight attendants don't seem to care these days when someone marches from the very back of E- and plants himself/herself in the Economy Plus exit row middle seat next to me. I'm sure my elbows are so attractive that they want to rub theirs with mine... Should I start ratting people out? Or will that bring nothing but bad karma?

sUA and sCO FAs on a bunch of my recent flights have been very vigilant in asking people to stay within E+ or E- (but free to move around within each of those areas), and that E+ costs extra money (or is a benefit for elites).