'My taxes are none of your business': Cuban

Mark Cuban
Gabriel Grams | CNBC

Mark Cuban may not be running for president in 2016, but the billionaire entrepreneur has a few ideas about the future of privacy and America's election etiquette.

In a blog post Sunday, the Dallas Mavericks owner detailed what he thinks is the most dangerous question that can be asked of a candidate.

"I can't think of anything worse I want to hear coming from someone that holds a public office or is a current presidential candidate than 'What do you have to hide'?" Cuban wrote. "The question is extremely dangerous when coming from a public official or someone running for an office.

"It is being asked for no other reasons than to intimidate and to throw the subject's privacy out the door and open them up to public scrutiny."

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A recent trend in the electoral process is for candidates to reveal their personal tax returns to the public, which Cuban says is a dangerous tradition. The billionaire notes that this could lead to further escalation, with candidates possibly offering to reveal personal emails, medical records or search histories.

Candidates who employ this tactic could then ask others "What do you have to hide?" forcing them to either comply and release this information or decline and face public scrutiny.

"So when I hear candidates ask that another make public their tax returns, it scares me," Cuban wrote.

"I have absolutely nothing to hide, and if I ever run for president you will have to take my word for it and I hope every candidate for office says the exact same thing," Cuban said. "Read my words: My taxes are none of your business."

Disclosure: Mark Cuban stars on "Shark Tank," which is rebroadcast by CNBC.