What does this even mean? And the tenants do have quite a bit of risk here: a fine of $20k is certainly worth pursuing through the courts. So also significant

What does this even mean? And the tenants do have quite a bit of risk here: a fine of $20k is certainly worth pursuing through the courts. So also significant property damage. They seem to be banking (and to be fair, so far it's a good bet) on landlords being too lazy.