Kudos to SW! As their Contract of Carriage states,
"Carrier may refuse to transport or remove from the aircraft at any point any passenger in the following categories as may be necessary for the comfort or safety of such passenger or other passengers: (1) Persons whose conduct is or has been known to be disorderly, abusive, offensive, threatening, intimidating, or violent, or whose clothing is lewd, obscene, or patently offensive;"
If someone complained (and I imagine more than 1 person complained for Keith to talk to her about it) then Keith was following the Contract. When you fly SW you are agreeing to this Contract whether you realize it or not.
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