Most sane people would clean mold growing on an egg right?

My cousin was showing me his eggs and one had mold on it.

I mentioned cleaning it to him. He mentioned some people using foot powder or something to that effect but said he was not concerned about it and left it alone with the 3 other eggs.

I was not at all worried about it affecting the other three eggs.

Anyone else would have used something to clean the mold, right?