I can't believe how willing people are to accept that if it is against the law it is wrong. Morality and legality, while occasionally overlapping, often have very little to do with each other. As a society, americans are very over protective of children. On top of all that, a surprisingly large precentage of people have the impression that pornography is sinful and disgusting, and that sex or anything sex related (stories, pictures, jokes, basically anything) is something that should be kept behind closed doors.
I agree that what they did was wrong, and they should most definately be fired for it. However, I see a distinction between showing pornography in a public place where children might see it, and handing out hustler magazines to anyone who wants one. I don't think that what they did should ruin their futures, but I do think that a misdomeaner and a considerable amount of community service would be well deserved.
As for violence versus pornography, while you can argue that one is natural and the other isn't, or that one is easily distinguished as fictional and the other isn't, the fact remains that both are something that you do not want children to be mimicing, and thus are kept from curious young eyes.