Voted option 6. I've played with a wide variety of skill and levels and have no issue with seeking to make the game fun. It helps that 95% of the time I'm the GM though
For comp play though, I've no issue with you (or squidface) if you snipe an Order Marker off of me knowing fully well it was a numbered one. Especially true if I was just putting OMs in order (like I do a vast majority of the time).
Really, its no different than if I focus fire a hero with 2 Order Markers on it knowing that you are going to lose at least 1 turn if that hero dies.