No Alarm?

In the Crown Room of the Delta terminal (#3) at O'Hare airport of Chicago, the men's restroom has a sign as you enter that says:

No smoking
alarm will sound

Without punctuation, of course, this means that if you smoke, you can be sure that the only way you'll be caught is if a person reports you.

vanity scan

A "vanity scan" is a search for things that refer to oneself. In the case of the author of a book, a vanity scan might entail seeking out that book on the shelves of a book store.