Why are they outcasts? Be Specific

The opening paragraphs of the story explain to readers why Oakhurst and the others are being forcibly kicked out of the town of Poker Flats. Readers are told that the town had recently experienced a theft of several thousand dollars. Additionally, some horses had been stolen. Finally, the town had suffered the loss of a "prominent citizen." The townspeople, in an knee-jerk response of sorts, figured that in order to restore the town's morality, certain people should be expelled from the town:

A secret committee had determined to rid the town of all improper persons.

In reality, The Duchess, Mother Shipton, Uncle Billy, and Mr. Oakhurst should count themselves fortunate for being kicked out of town. The other two men that were removed from the town were removed on a more permanent basis: they were hanged. Mother Shipton and The Duchess are being kicked out of town for prostitution. Uncle Billy is a suspected thief and a confirmed drunk. Mr. Oakhurst is not a law breaker; however, he is a very good gambler. The people want him gone because he has won too much of their money.

Mr. Oakhurst was right in supposing that he was included in this category. A few of the committee had urged hanging him as a possible example, and a sure method of reimbursing themselves from his pockets of the sums he had won from them. “It’s agin justice,” said Jim Wheeler, “to let this yer young man from Roaring Camp—an entire stranger—carry away our money.”