You're suggesting that police install concealed video cams in public bathrooms and film people at stalls and urinals?
"Craig's threat could have been motivated by fear, even if he was innocent."
"Let's see police video of Craig entering Karsinia's stall and closing the door, or handing Karsinia his hotel keys and saying 'meet me tonight,' or some other evidence that is much more clear cut than we have here.
Unless the court has good reason to believe the officer is not trustworthy, his word is going to be better than yours or mine.
There are obvious problems with using such cameras, just as there are obvious problems with permitting a cop's word alone to destroy a man's life. If I have to choose between the two, I'll take the video cam. A ground level camera facing the front of the stall, that cannot record anything above the level of the partition.
To place a hand or foot inside another person's bathroom stall and to make bodily contact with the person in that stall, constitutes disorderly conduct, with or without lewd intent.
In most cases I bet it constitutes accidental conduct that should not be prosecuted.