I live by the motto "I work for money and appreciation, in that order. If you want loyalty, buy a dog!" It has served me well and removed a LOT of stress. I walked out of one crap-hole with a yelling management style on on week's notice. They told me it was unprofessional, and I laughed in the VP's face and told him he was lucky he got a week.

That is also my motto at work. You know what's unprofessional? Managers screaming at people. The fact that they thought dysfunction like that is OK but one week's notice is "unprofessional" tells you everything you need to know.