At first I thought these rules were okay, but it seems that now these rules have been set regular players do nothing but try to abuse them.
If someone ressed their build they dig under locked doors and walls to gain access to the things inside.
I'm really not digging how people are abusing this and causing intentional grief to other players.
If I were to leave my back door unlocked one night and a burglar came and took all of my shit, that'd still be theft. Rules in any sort of society/community are based on basic morals.
I just think people should just stay out of other people's stuff. As I see it the /res function is to protect yourself from intentional griefers. Now it's some sort of tool to define liabilities if someone breaks the rules.
Think of this:
If you protect only small sections of your build or attempt to subvert the purpose of the Residence plugin by zoning only the outer wall, it will not be considered grief if a players tunnels or scaffolds around your defences. Any unprotected build, even if it is part of a larger protected build, is fair game as long as you keep in mind what is reasonable and proportional, as stated
Now, if a player /res'd his build, but didn't /res his floor or anything under it, it would not be violating the rules if you dig under it unless you do too much damage. What you are stating is exactly what I've described here.