Take a look at the totality of my posts on the subject Courtney and you will see that you and I, and indeed Willard, are pushing at the same open door. If my comment was harsh then it was reflecting Willard's rather rude suggestion about what I do with my emoticon- although no idea what a "jacksie" is.
Anyway, as for sanctimonious, bit presumptuous of Willard not to consider that the defecating mouse visited the worktop post march-out of the previous occupant; you know, when the house was all quiet and still - the way mice like it. Either way, fault lies with marching in/out officer for not "spotting" so to speak. So this little episode rather enforces the merits of a robust march out system I think.