I can agree that people who steal are likely to steal from anyone, if they think they can get away with it. Now, please tell me what people who go to Chippendales might do. Are you afraid they will interact sexually with students? Discuss sex in the classroom?
Please remember that there is a LOT that goes on with a person that you may not know. Is it MORAL to assume that I am depraved because I have been to a Chippendales show and fire me, while the teacher next door is carrying on an affair that you don't know about?
They might make inappropriate comments. They may discuss sex either in the classroom or with students outside the classroom and my concern there is the projection of values that aren't biblically based. They might introduce inappropriate materials.
They might do something as stupid as bringing bananas to class and having the students put condemns on them and then teaching the kids that pre-marital sex is normal and not wrong and that the condemn is sufficient protection.
"Is it MORAL to assume that I am depraved because I have been to a Chippendales show and fire me, while the teacher next door is carrying on an affair that you don't know about?"
Yes, because while you are both depraved, the teacher next door had the good sense to be discreet about it. Therefore you are fired because of your depravity AND your poor judgement. While the teacher next door is not.
Maybe that is not fair, but it is certainly MORAL to take action on what you do know about. And it is certainly MORAL to judge the character of the people teaching your kids, and insure that your kids are entrusted to appropriate role models.