Do you report to a credit bureau? If so... you should be regulated against nonsense fees.
If you're a regular company that can print up an invoice with $1800 or $15000 in overages, but that can't do much to enforce it or ruin someone's life over it, then don't bother.
If you can report to Experian & Equifax and have made countless mistakes in the past(a la Verizon), the government should be allowed to step in and say "this is ridiculous."
The Rossmann Group.