What good would that do it wouldbe before his meter so he wouldn't be paying it would be theft from supply companyTap into his incoming mains cable and put a 10 kw load bank on it.
Wow, this got blown out of proportion pretty quickly.
I recently had a similar problem with the farmer behind us. A tree had grown into the brickwork of the garage/workshop.
A quick chat and an hour of chainsaw action later we were all happy.
As for weedkiller..buy once, buy professional. SNAPPA/SNAPPER is what you want, its non selective and kills anything you spray it on to within 72 hours.