No one adds MeOH to homebrew. Bootlegging fake hard drinks is a completely different industry, which has zero relation to homebrewing.
In Poland and other European countries where home distillation has been practiced for centuries nothing would happen but an instant cultural shift in the US with a major uptake in homebrewing certainly will. Ratbags and carpetbaggers will find ways to get in on the act and that's when the trouble will start.