Nobody likes griefers, especially builders, however I have a solution for this.
At least every sky base builder or shop builder, base builder, has encountered a griefer, and it is not fun.
There should be an option in settings (the 3 lines on the left controller) where you can control who is allowed to place and grab pillows, objects that were placed down by the owner of those blocks.
For example: If I place down a pillow 1x1 and make a wall with those, I go into setting and whitelist “Billy.” Therefore he is allowed to place and grab the objects owned by me.
But even this could get out of hand, to fix this here is my solution,
On the leaderboard in each map, there will be a vote button, this vote button will make a vote saying “Delete “player name” objects” This will allow people to vote to people that are causing too much lag or purposely placing blocks on another persons build to remove their objects.
This is just a quick draft and anything could change in this draft. If you have any disagreements or agreements or even just a discussion, ping me below.