Well, maybe not the latest because of the age of the incident, but it doesn't seem to have been widely publicized at the time.
The video below weighs in at over 11 minutes, so here's the gist of it:
A new mother evidently pumps her breast milk while away so that she can feed it to her son upon her return. Armed with a printed copy of TSA's policy, she asks that her breast milk not be x-rayed and that TSA follow their alternative inspection policy on medical liquids, which applies to baby formula and breast milk.
Thus challenged, the TSA screener sets her belongings aside and confines her to an inspection holding area for nearly an hour, resulting in the young mother missing her flight home.
Here's the clip:
Now, here's what the Transportation Security Administration's own web site has to say about breast milk (emphasis theirs):
When carrying formula, breast milk, or juice through the checkpoint, they will be inspected, however, you or your infant or toddler will not be asked to test or taste breast milk, formula, or juice. Our Security Officers may test liquid exemptions (exempt items more than 3 ounces) for explosives.
Now maybe, just maybe, the TSA screeners here gave her a hard time about it only because she wasn't actually traveling with her baby. Maybe. But that doesn't negate the petty vindictiveness of the TSA employees shown here.