Did you read the release? They are up front that its entirely an issue about setting a bad precedent. Its completely and totally about the fact that it would be used over and over again, and nothing to do with the fact that is it possible. Your overly cynical stance on this is misguided, as you seem to not have grasped the information in the letter.
If you believe that the FBI wouldn't abuse a tool like that after the past few years of coverage of the Security sector there is really very little hope for you.
