I don't see why a group being "susceptible to hearsay and misdirection" is a good reason for their ire to be directed at more companies rather than just one.
I also don't see any reason why a group fighting against the injustices they can tackle, obliges them to take on the ones they can't.
EDIT: To take your example of the justice system - if I steal from someone, it would not be a valid defence to point out that other people had not been successfully convicted of stealing, therefore I should not be prosecuted.
I don't see why a group being "susceptible to hearsay and misdirection" is a good reason for their ire to be directed at more companies rather than just one.
I also don't see any reason why a group fighting against the injustices they can tackle, obliges them to take on the ones they can't.
EDIT: To take your example of the justice system - if I steal from someone, it would not be a valid defence to point out that other people had not been successfully convicted of stealing, therefore I should not be prosecuted.