I believe you have the hypothetical confused.

> if they were targeting you specifically

They are not targeting Natanson at all from what I can tell. They're targeting a source she's writing from (to what extent isn't clear to me). This is precisely why I'm positing Whren doesn't apply here.

I get the idea of being 'papered' out of a system, but I'm trying to distinguish a pretext that can be justified (objective probable cause) from one that can't (abuse of process). My boss can easily provide reason relating me to fire me, however fantastic the reality, but those would be refused, for good reason, if they surfaced them through private channels outside the organization.

In the case of drugs, they probably wouldn't have any reason to raid you unless you were suspected of stashing drugs or money or some other evidence. The journalist is reasonably likely to be in contact with the leaker and so the cops have a somewhat valid pretext to seize things they thought contained evidence of the crime. Whether or not the cops should be able to do that is another thing, but the precedents have been long set.

The really strange thing here is the massive raid in the middle of the night rather than a more proportional response. That suggests that the journalist was being targeted specifically.