Anonymity as a lifestyle, Need help with rules tweak Options

[fctarbox3]

So anonymity is getting crampingly complicated for me. Buy a new SIN every few weeks, keep multiple SINs for different purposes -- casual lifestyle, meeting Johnsons, etc. etc, use nanopaste disguises and a throwaway commlink on meets/runs, blast all your RFID tags, except your street clothes, because not having tags draws attention otherwise. Thank God material links are gone, or you'd need a mage to cast sterilize every 20 feet. Other stuff I've forgotten, which is the point. I've forgotten. Shadowrunners probably keep notebooks (stored on their super secret heavily encrypted disguised to look like an emotitoy commlink that only works when it's within 30 feet of an RFID tag that you've stored in your safehouse just outside Seattle proper that can only be reached by swimming through an underground tunnel in a cave with a 2 foot wide entrance) to know what to do every week, but I'd rather not. It interrupts the flow of the game.

So I'm thinking of creating a personal rule that you can buy anonymity as a lifestyle mod. Maybe someone's had this idea already and you can point me to the thread.

It'd be split out like the categories in the Advanced Lifestyle rules in Runner's companion.

At street, you don't have a SIN. You live in the Barrens or something and simply cannot visit polite society.

At squatter, you're an average joe. You have a single SIN, real or fake, use it for everything, and suffer the total exposure of the modern world.

At Low, you replace your SIN every once in a while, maybe your commlink too, etc. etc.

What I need is a nice simple mechanic for "Anonymity tests." I'm not sure when or how often it would apply, what events would trigger it, etc. etc. I've never written a custom rule before and I'm looking for help/ideas.

Please?