I've always seen pepole do access signs for crafting tables and enchanting tables why? I've done tests and you don't need access signs
That was the old way . Way back like a year ago when you had to Edit: I still do it even but now I stick them on a wall at 2543
The same is true for ender chests - anyone can open them without flags. I actually once had someone ask me why I kept trying to steal from theirs xD