Why are inductive loads an issue for the power grid?
When the load is reactive the currents are higher than necessary, compared to a load with a power factor of 1.

As a result the losses in the distribution network are higher, so each watt of power consumed costs more power at the point of generation. 

Industrial loads tend to be inductive (as in motors). Capacitor banks local to the inductive load can correct the power factor. 

Residential customers typically are not penalized for power factor.