If you don't pay after getting the notice, the new owner will file an eviction court case (also called an unlawful detainer).

Otherwise, failing to do any of the above could lead to unlawful detainers, property damage and financial ruin.

They should have an Unlawful Detainer form of some sort that you have to fill out.

Your idea is unlawful.

Vacant or improved, the process and consequences are identical.Each State can have variation, especially in the time line, but:unpaid tax billings will produce a some point create a Tax Lien on the property, not the owner.after X years, the existing owner will get a Notice of Tax Sale and a date of the auctionIf the property is sold, the "punishment" is loss of the property and I've been told, there's no reporting to a Credit agency. 

If the second, then the higher chance that someone will get "punished" for the default. 

Cross I's and Dot your t's with the notice (make sure you spell out the address and all premises included; list all tenants; give the specific date of surrender).In most states you would file an eviction for unlawful retainer of premises (or something to that effect).

There will always be bad apples, but at least the state CAN go after licensed bad actors, punish them financially, or even put them out of business for their misdeeds.

Very discouraging and makes you want cruel and unusual punishment legal.  

As such, the agencies do not punish you for the Mortgagee's lack of timely action.