Again, it's not about not getting paid or allowing customers to run up a big bill and not paying.
It's about the lengths some wc'ers go to to chase a debt. Some go to lengths and take measures that I see as wasted effort. But that's just my opinion.
And all customers are different and we can't always judge another's customer by a few words on the internet.
Another thing is, the OP was saying it's detrimental to the 'industry' to let off bad payers. I reckon some of the more extreme attempts at collecting payment are far more detrimental.
There's nothing wrong with wanting payment, chasing it up, even going down the legal route.
But sometimes it's beneficial to just take a knock. You might not be able to see the benefit financially but you can see them in other ways.
And in business you can't always account for every penny.