It disables sign editing for the people who don't have the permission for it.
useful if you are using plugins like lockette
Code (YAML):
settings: ##this permissions enables editing signs permission: signedit.permission
##this option disables editing all of the signs disableAll: true
##if disableAll is false this option only disables signs with specific keywords onlyDisableKeywords: -
"private" -
"locked" -
"shop"