So I was thinking about some things that might be nice to improve multiplayer interactions and also making the visiting peoples home worlds viable/troll-proof:
1. Add a trade option; drop trading is just the worst method for trading.
2. Add option like "survivor access" that locks chests for MP ppl by default
3. Maybe also make it so people can't destroy or harm structures placed by others, so standard pve rules I suppose? :P
Actually pve rules would also go a long way in preventing your NPC's from destroying your house when a predator gets inside, would maybe even be interesting if it applies to the builder too so destroying would only work by means choosing "destroy"