It has happened to every vegetarian who has ever gone to group lunch/dinner with their friends, colleagues or family.
Here is the scene. You go to a nice Italian restaurant (Olive Garden..anyone ??). You have mix of vegetarian and non-vegetarian people in your group.
You decide to start with appetizers.You order Bruschetta (Vegetarian) and Silican Scampi (non-vegetarian). Guess what, Bruschetta shows up before Silican Scampi and everybody jumps on to Bruschetta. Then Silican Scampi shows up and its just non-vegetarian folks gulping it.
Outcome: Vegetarian are starved on appetizers.
Similar thing happens during the main course. Again vegetarian people have to order more food while non-vegetarian people cannot finish theirs (since they already gorged lot of vegetarian stuff and are now full).
Outcome: Lot of non-vegetarian food is wasted !!
I am sure you can empathize me on this, especially if you are vegetarian.