The national designation, by contrast, is purely honorific and doesn't trigger any diminution of property rights.

FORBES: Bringing the past back to life

But for tax purposes the entire property will be included in the estate of the first to die, which could trigger state or even federal estate taxes on the whole property.

FORBES: Investing

But watch out: Depending on where the property is situated, transferring LLC interests can sometimes trigger state and local transfer and recording taxes.

FORBES: Buying Main Street: Time To Add Commercial Real Estate To Your Portfolio?

Not only payments for services trigger a Form 1099, but now payments for property will too.

FORBES: Partial Form 1099 Repeal Likely

Other possible red flags that could trigger an audit include deductions for either a home office or maintenance of a rental property.

FORBES: Audits: The IRS' Big Stick

Moreover, these actions can trigger lots of other laws (particularly if botnets are involved), such as intellectual property, spam, fraud, contract, and tort laws.

FORBES: Caution: Active Response to Cyber Attacks Has High Risk