Here's one to add, from a scrapper.
If you are the type that bails on the party, you know, "I'm sorry, I got booted." when the countdown to log off was there for all to see, delete your defender now. You have no business in the business. You don't mind me playin meat shield but when it's hot the way WE like it, you're gone in 30 seconds. Telling a scrapper not to die in battle is like tellin a bear not to scratch his backside on a tree.
This is not to the majority of you who faithfully heal under fire, but to those whose faithfulness is...weak.