How To Block Outgoing Calls And Texts To Contacts (prevent Drunk Dialing)

I am making an android app for a class that prevents users from calling or texting while they are drunk. Basically, before they start drinking, they start the app which would block

Solution 1:

Since CyanogenMod is open source, you might be able to find out the answer to this by looking through the Phone Goggles code: http://www.cyanogenmod.com/features/phone-goggles

Since it accomplishes the same thing you are trying to write as a separate app, which is nice for people not running a CM7.