I'd rather just provide the basic "!" old-style command API which were used before the Lua scripting kicked in. Maybe readding some constructs like the !if thingy...
I mean, one line of code per sign and just commands like ! and tpt...(Because it doesnt have hacking functions, obviously, just element ruining, and can be restored easly with elements.loadDefault()) not things like if, while, so theres no hacking scripts.