Have boycotts ever been effective, including the one against Captain Charles Boycott?
"In 1880...the Irish Land League...withdrew the local labour required to save the harvest on Lord Erne's estate. When Boycott tried to undermine the campaign, the League launched a campaign of isolation against him in the local community. Neighbours would not talk to him. Shops would not serve him. Local labourers refused to tend his house, and the postman refused to deliver his mail.
"Boycott left Ireland on December 1 of the same year."
I don't know if they got everything they wanted, but they got rid of him.