[oceanstone]

Yes, you can put it in a special bag that blocks its signals. If you buy a FastTrak device for the SF Bay Area, it actually comes in the bag. Still, you have a license plate. (Unless you are like Steve Jobs, and lease a new car every 6 months)

[joezydeco]

The "special bag" is just an ESD bag, isn't it? You can find these pretty cheap anywhere if you don't have any on hand.

http://www.amazon.com/Antistatic-Bags-Resealable-6X10-Pack/d...

[tjohns]

Yup, it's just an ordinary mylar antistatic bag. Pretty much any computer repair store will give them to you for free if you ask, too.