A few weeks ago, I wrote about a clever use of SMS at the Washington Capitals game.

Today, I got an SMS spam from the Caps inviting me to see the Barenaked Ladies sing the national anthem before the Caps game tomorrow night. Nowhere in the scoreboard promotion did I see an indication that by particpating I was signing up for Caps SMS promotions.

That spam cost me 15 cents. The SMS offers an opt out by responding to the SMS. (For an additional 15 cents.)