@Ragman,
I don't see it as a victimless crime - there are only so many allotted free parking spaces for those given those as part of their employment.
However, I wouldn't go so far as a colleague did re students parking in staff allotted area -
she kept license numbers
let the air out of one tire per offense
there were never more that two
I think this is not the way to handle it, of course.
I would report the license number. Presumably people give their husband's car(s)' license #s too.
Ah, I see I haven't read the last posts. This'll be interesting.
Adds, in our lot, there were relative few employee spaces, handy to the building, and hundreds of spaces for hundreds of students, further from the building. The students weren't going to the building, our parking was just closer to the "trolley" to campus.