Wastage of food at weddings

I want to express my viewpoint and address all those who get the opportunity to attend wedding-cum-dinner invitations. I have observed people have the bad habit to take as much food as they can for them or their family or friends, never thinking who is behind them.
Later, he is unable to eat all the items which are left without any regret as this food is prepared "free of cost". If suppose, any extra food is prepared in his home, then would he waste it in the same way or keep it for the next day then why waste other's foods.
I think the reasons why people waste food at weddings. 1. From the fear that if he goes the second time, then the food dish would be empty or not available, due to lack of food.2. For the first time he has seen such food or as if he has been hungry for days.
3. Due to lack of education they do not realise if you take extra food then some other guest will remain hungry, please think about others who are also human beings If you are a true and honest Muslim then make it a habit to take as much as you can eat without wasting a single bite. If we do not waste food at weddings then it is sufficient for 15 to 20 waiters who are busy in service and watching with hungry and thirsty eyes the food.
I want to give a message to all of you that if you remain hungry or eat less food then you do not sin but if you take extra food in your plate and later fail to eat all it is a sin.