Makes sense
If you look at Martha Stewart's case, her broker went outside to use his cell to call Martha and warn her.
Instant Messaging is also being logged.
Bottom line for those brokers is to go to Wal*Mart and buy a disposable cell phone and minutes card.
Or actually buy a couple of them so when you have to ditch one, you have a spare on hand.
But hey what do I know?
;-)