Most worrisome, we've heard some reports of the government using pen/trap taps to intercept content that should require a wiretap order: specifically, the content of SMS text messages, as well as "post-cut-through dialed digits" (digits you dial after your call is connected, like your banking PIN number, your prescription refill numbers, or your vote for American Idol). intercept information about your Internet communications as well.
Precisely what data these "stingrays" collect will hopefully be soon revealed through such efforts as those of EPIC.
It should be noted that the Stingray is one of multiple devices with the same application. The Stingray and several others are trademarks of the Harrison Corporation. Some are quite pricey ($75,000), and others are, as mentioned last year by a Slashdot reader, peculiarly affordable — and available.
For a more comprehensive overview of the subject, see the WJS article in the primary URL.
I meant to write "tool" in the post.
However, I like your reading of the sentence as well.
sigh.
"If anything can go wrong, it will." -- Edsel Murphy