Any person who engages in illegal cyber activity, that activity is more than just likely to spill over onto his hard drive and would not be limited to the internet.

There are laws in most states that prevent criminal damage and owner's can be charged with a felony if found guilty.

I am a financial statement auditor, and was a tax examiner for the IRS and also worked in their Criminal Investigation Division.

Relying on these prior decisions, the court in this case held that a municipality violates the Fourth Amendment when it requires a property owner to consent to a warrantless inspection of their property or face criminal penalty.

Did you do the standard Criminal Background Check, Credit Check, Eviction Report for all 50 states along with monthly salary 3x PITI?

How will you do back rounds, criminal, credit checks, job references, recent rental history etc.?

I'm in Washington state, so you can't use this as is, but here is an example from our crime free addendum, which came out of a partnership with our local police:Crime Free Rental Agreement AddendumFor the premises identified in the rental agreement, Landlord and Tenant agree as follows: Tenant, any members of the tenant's household or a guest or other persons affiliated with the tenant:1.Shall not engage in criminal activity, including drug-related criminal activity, on or near the said premises.

there's plenty of information online that's available to the public. its all a matter of researching. for instance, not long ago I was looking up some relatives of mine. yes, I know they are my relatives but all I did was search online for their names and got death certificates going back a century plus. my point is that like marriage licenses, property owners and criminal background, death certificates are apart of public record also. 

If you have any concerns of a legal nature, you should consider sitting down with an attorney in your jurisdiction to examine the unique criminal and civil liabilities that such activities could potentially expose you to.

Specifically the criminal activities section.