Buffet just opened at my sisters wedding, and they immediately packing food to take home

This happened during my sister’s wedding reception. The food was just announced open for the buffet, and while most guest were lining up to eat, some of my relative from my mother’s side skipped the line completely and started filling plastic bags with food to take home, before even having plate for themselves. It was so embarrassing, especially for the newlyweds who paid for everything. Like, can we enjoy the event fire?