About the star pieces - how about finding some custom path to place instead of star pieces? Some people might really want to take them.After an IRL friend ransacked my island I am very paranoid about letting anyone in. She needed iron and I told her about 4-5 times to only take the stuff on the ground around the rocks. I went AFK to make lunch because I thought she understood. She took the stuff around the rocks, my turnips in their farm area, all of my fruit and all of the materials in my crafting area including 60+ customization kits. She brought back the crafting stuff (didn't realize she took my turnips until I was ready to sell) but she said she thought she could take it. I'm not really sure why people think if its on the ground its theirs to take. I use star pieces to decorate my town and now I'm having second thoughts.
Also, I feel that fear Dormire thought and ugh, I guess that person just thought they will get away with it. I don't understand, even when I was buying a villager I asked if I could enter that house just to be sure, like... that game and the community has that vibe which really makes me want to be good for people, isn't that with everyone? :< Though I'm not so trusting too - I prefer to buy things here as I can check people's feedback.