Well, things might be "a changing!"
Some of these new electronic power meters are just "loafing" when all they report is total kWh! At essentially the same manufacturing cost, they could easily report anything that can be billed from peak demand over various intervals, to peak amps or harmonic amps!
If the next effect of "mom and pop" drawing too much harmonics causes money to be spent then the regulating authorities will authorize billing "mom and pop" for their effect on the system.