Originally Posted by littlemissmuffet:
Can we do anything to make sure this doesn't happen to any other people, legal, civil, or otherwise?
Not likely. Most daycares, centers and home can term at will.
I have suspicions you and/or your wife were disrespectful to the daycare workers and that's what earned your termination note - could be wrong, but I doubt it 
My only concern is their note was completely unprofessional - that is, if you didn't paraphrase!
That was my thought too...considering how rude the OP was to forum members, it wasn't much of a leap...