Picketing"
Good luck. Even if you could get 1,000 of your best friends to picket anywhere on Disney's property, I can guarantee you will be disbursed. A quick look at the Florida ACLU's page reads:
"You do not have the right to block a building entrance or physically harass people. The general rule is that free speech activity cannot take place on private property, including outdoor malls, without the consent of the property owner. You do not have the right to remain on private property after being told to leave by the property owner."
ABC earns Disney billions, not millions. A grass roots boycott of an ABC sponsor would be like boycotting Walmart.