Remove this please

This single tile of sand in Dragon Tail Island is really triggering me. There are no sand around it and it is benath 21 tiles of rock. I know i don't HAVE to mine it but whenever i press L this thing stares at me like green goblin mask and i think i can't hold it anymore. It is on the default starting floor around the second oil deposit. It is only visible when you expand the island an make a port there lik me.

Perhaps a toggle could be added to show / hide individual indicators like this. I have a few that I am simple not going to be able to mine out I get your frustration.