This should be in the game to avoid griefing to other players ships. I had my ship griefed many times and stuff taken from it but with this it could fix it and then no more stealing or griefing.
This needs to be in the game. There are some commands to protect your ship in multiplayer as I mentioned here: http://community.playstarbound.com/threads/how-to-protect-your-ship-in-multiplayer.120753/ but then the owner can't even break anything. Having a shield generator with permissions allowing for Owner/Friends to Destroy/Interact with things would be invaluable.
What, you guys don't like having your respawn point filled with lava so that death becomes an endless cycle? ...Yeah, me either. Extending this to player constructed buildings would be great, too.
How can someone destroy your ship if they are not in your party? You basically giving them permission to do it by accepting them in a party.