When Shen Yanxiao looted from the Vermilion Bird Family, she still adhered to the concept of how one should never steal from one's family and she only did it because she wanted to test her skills. Therefore, they got off easy as she only took the minimum from them. For the other three families, however, it was a different matter.
Plus, she had a reason for her actions…
It was because she saw the opportunity to grab the feathers from a flying goose! Her actions were so cruel that it would make one's hair stand up in anger!
One example would be the Seven Star Treasure Sword that hung on a certain young master's headboard in the Azure Dragon Family. The dazzling gems and even the gold ornaments on that luxurious scabbard had been entirely scraped off.