Each person would of course have their own method of saving like this, thus completely neutralizing this statement.
Like I can't throw in a variable or change a couple of words each time right?
I would release the builds, not the script.
The mod wouldn't be an addon. It would be an executable program that would run WITH Blockland to transfer the data.
Badspot can't bypass this. Once released, if at all, every person can change the .exe name of the program and it would be untraceable. (Of course, change the save location as well - at the very least it would be a pain in the ass to try to block it based on how it acts within the game.)
You have no idea how things work. Bricks are already saved completely client-sided.