As I'm looking over a character submitted to me by a player (and whittling down the number of licenses the character has, since IMO one license can cover multiple pieces of "related" Restricted material), it occurs to me that while any one particular license may seem pretty innocuous, but if one looks at a whole collection of licenses registered to a single SIN, that SIN becomes a lot more suspicious and could be subjected to increased scrutiny.
For example, a security guard may not raise an eyebrow at a SIN that has a gun license, or a SIN that has a license for performance-enhancing 'ware, or a SIN that has a locksmith license... but if he's looking at a SIN that has all of those, plus a demolitions license, a smartlink license, and a Chameleon Suit license, the guard would probably contemplate doing a more thorough check of that SIN just to be on the safe side.
While I probably wouldn't use it in this particular game (the focus is not on that sort of operational detail), I'm thinking of something along the lines of this would work as a house rule for a more gritty/detailed planning style of game: "For every separate license attached to a Fake SIN beyond its rating, add 1 to the rating of any SIN verification performed on it (up to the capabilities of the hardware and/or the availability of more thorough verification)."
I realize that the whole "SIN Verification" rating is meant to abstract away some of these details, and a lot of it is probably computerized with no operator intervention, but at the same time I think there's plenty of potential situations where a SIN verification system is not used to its full extent by harried operators who are just trying to get people through as fast as possible/are bored and just waiting to go home/etc, but those operators might pay more attention to apparently-legal-but-still-suspicious SINs.
What do you think?