Campaign asks members of the public to protest deportations on commercial flights by refusing to take seat. Campaigners have “hacked” hundreds of adverts on the London Underground, replacing them with notices telling passengers how to disrupt attempted deportations on passenger airlines. The signs, branded “See It, Say It, Stop It” in reference to the British Transport Police’s “See It, Say It, Sorted” public safety slogan, encouraged people to take action on commercial flights if they believe someone is being forcibly removed from the country. Posters called on passengers to demand to talk to the pilot or to remain standing and refuse to sit down if a deportation is taking place. More than 200 ads were replaced with the signs on the Piccadilly, Victoria and Central lines as part of the campaign by queer activist group Lesbians and Gays Support the Migrants (LGSMigrants) on Tuesday to mark International Migrants Day.