Will a low power factor busniess load upstream of my home cause a low power factor supply to my home?
Power is volts x amps x power-factor.

This means if you take 50A for 1 hour from 230V supply and your power factor is unity then you're meter will register 50 x 230 x 1 watt-hours or 11.5kWh

If your power-factor were 0.5 and you were taking 100A, your power meter would read the same wattage or watt-hourage.

Your electricity meter measures power consumed by your circuits and just because someone up the street has a different power factor it won't affect how the electricity company charges you for your power consumed.