The OP seems obsessed with stopping people from using free electricity
Free to who? If you're in the UK, chances are any PV panels attract the Feed In Tariff subsidy, which is a tax on all other electricity users so that PV owners can stand back and boast about their "free" electricity, and how they're "saving the planet". Of course, in winter their panels are useless roof decorations, and they contribute exactly the same as everybody else to peak electricity demand, which is what sets the majority of electricity costs.
In my book, PV owners = Tax dodging sanctimonious knob ends.