This topic is funny to me, only because other than the "I need the AC outlet" travellers/business people and the non-deserving Blue-Carders, the people who hold space in line with bags are the most annoying.

First, if they are getting food, why can't they get it for all of us?
Second, (it has been said but...) as an "A" Card holder, you are automatically getting a good seat. Why the rush and why the rudeness?

What makes it better is when the people who have put bags down and left or the cutters choose to take a seat in the middle on the plane not at an exit row (or on flights to Burbank, the back of the plane). Why the hassle? Why is seat 14C so important?

I know I am rambling, in conclusion, don't hold your place in line with a bag. Better yet, if your bag is big and heavy, check it!